641226132 has 120 divisors (see below), whose sum is σ = 1743837480. Its totient is φ = 205286400.

The previous prime is 641226127. The next prime is 641226133. The reversal of 641226132 is 231622146.

641226132 is a `hidden beast` number, since 6 + 41 + 2 + 2 + 613 + 2 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 229704336 + 411521796 = 15156^2 + 20286^2 .

It is a super-2 number, since 2×641226132² = 822341904719362848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 641226096 and 641226105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641226133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1066632 + ... + 1067232.

It is an arithmetic number, because the mean of its divisors is an integer number (14531979).

Almost surely, 2^641226132 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641226132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (871918740).

641226132 is an abundant number, since it is smaller than the sum of its proper divisors (1102611348).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

641226132 is a wasteful number, since it uses less digits than its factorization.

641226132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743 (or 732 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 641226132 is about 25322.4432470487. The cubic root of 641226132 is about 862.3238627089.

Adding to 641226132 its reverse (231622146), we get a palindrome (872848278).

The spelling of 641226132 in words is "six hundred forty-one million, two hundred twenty-six thousand, one hundred thirty-two".