1261856232 has 288 divisors, whose sum is σ = 4444221600. Its totient is φ = 332470656.

The previous prime is 1261856213. The next prime is 1261856273. The reversal of 1261856232 is 2326581621.

1261856232 is a `hidden beast` number, since 1 + 2 + 61 + 8 + 562 + 32 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1237819 + ... + 1238837.

It is an arithmetic number, because the mean of its divisors is an integer number (15431325).

Almost surely, 2^1261856232 is an apocalyptic number.

1261856232 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 1261856232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2222110800).

1261856232 is an abundant number, since it is smaller than the sum of its proper divisors (3182365368).

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

1261856232 is a wasteful number, since it uses less digits than its factorization.

1261856232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1067 (or 1044 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 1261856232 is about 35522.6157820620. The cubic root of 1261856232 is about 1080.6124304241.

The spelling of 1261856232 in words is "one billion, two hundred sixty-one million, eight hundred fifty-six thousand, two hundred thirty-two".