1256215152 has 40 divisors (see below), whose sum is σ = 3246795664. Its totient is φ = 418535424.

The previous prime is 1256215123. The next prime is 1256215159. The reversal of 1256215152 is 2515126521.

It is a super-2 number, since 2×1256215152² = 3156153016228766208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256215159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119418 + ... + 129510.

Almost surely, 2^1256215152 is an apocalyptic number.

1256215152 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1256215152 is an abundant number, since it is smaller than the sum of its proper divisors (1990580512).

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

1256215152 is a wasteful number, since it uses less digits than its factorization.

1256215152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12697 (or 12691 counting only the distinct ones).

The product of its digits is 6000, while the sum is 30.

The square root of 1256215152 is about 35443.1255958049. The cubic root of 1256215152 is about 1078.9997460434. Note that the first 3 decimals are identical.

The spelling of 1256215152 in words is "one billion, two hundred fifty-six million, two hundred fifteen thousand, one hundred fifty-two".