1225641132 has 120 divisors (see below), whose sum is σ = 3464501040. Its totient is φ = 376513920.

The previous prime is 1225641127. The next prime is 1225641191. The reversal of 1225641132 is 2311465221.

1225641132 is a `hidden beast` number, since 1 + 2 + 2 + 5 + 641 + 13 + 2 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 1225641096 and 1225641105.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 225082 + ... + 230462.

It is an arithmetic number, because the mean of its divisors is an integer number (28870842).

Almost surely, 2^1225641132 is an apocalyptic number.

1225641132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1225641132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1732250520).

1225641132 is an abundant number, since it is smaller than the sum of its proper divisors (2238859908).

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

1225641132 is a wasteful number, since it uses less digits than its factorization.

1225641132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5453 (or 5442 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 1225641132 is about 35009.1578304877. The cubic root of 1225641132 is about 1070.1741155500.

The spelling of 1225641132 in words is "one billion, two hundred twenty-five million, six hundred forty-one thousand, one hundred thirty-two".