641142 has 32 divisors (see below), whose sum is σ = 1474560. Its totient is φ = 206280.

The previous prime is 641131. The next prime is 641143. The reversal of 641142 is 241146.

641142 is nontrivially palindromic in base 7.

641142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×641142² = 822126128328, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641143) by changing a digit.

641142 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1483 + ... + 1865.

It is an arithmetic number, because the mean of its divisors is an integer number (46080).

2⁶⁴¹¹⁴² is an apocalyptic number.

641142 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 641142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (737280).

641142 is an abundant number, since it is smaller than the sum of its proper divisors (833418).

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

641142 is a wasteful number, since it uses less digits than its factorization.

641142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425 (or 419 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 641142 is about 800.7134318843. The cubic root of 641142 is about 86.2286147359.

Adding to 641142 its reverse (241146), we get a palindrome (882288).

The spelling of 641142 in words is "six hundred forty-one thousand, one hundred forty-two".