1261632152 has 48 divisors (see below), whose sum is σ = 2753147880. Its totient is φ = 539728640.

The previous prime is 1261632109. The next prime is 1261632161. The reversal of 1261632152 is 2512361621.

It is a super-2 number, since 2×1261632152² = 3183431373920302208, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21878 + ... + 54789.

Almost surely, 2^1261632152 is an apocalyptic number.

It is an amenable number.

1261632152 is an abundant number, since it is smaller than the sum of its proper divisors (1491515728).

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

1261632152 is a wasteful number, since it uses less digits than its factorization.

1261632152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76712 (or 76697 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 1261632152 is about 35519.4615950186. The cubic root of 1261632152 is about 1080.5484617083.

Adding to 1261632152 its reverse (2512361621), we get a palindrome (3773993773).

The spelling of 1261632152 in words is "one billion, two hundred sixty-one million, six hundred thirty-two thousand, one hundred fifty-two".