1255776531 has 32 divisors (see below), whose sum is σ = 1759475520. Its totient is φ = 795648000.

The previous prime is 1255776527. The next prime is 1255776547. The reversal of 1255776531 is 1356775521.

It is not a de Polignac number, because 1255776531 - 2² = 1255776527 is a prime.

It is a super-2 number, since 2×1255776531² = 3153949391620787922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1255776131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2117371 + ... + 2117963.

It is an arithmetic number, because the mean of its divisors is an integer number (54983610).

Almost surely, 2^1255776531 is an apocalyptic number.

1255776531 is a deficient number, since it is larger than the sum of its proper divisors (503698989).

1255776531 is a wasteful number, since it uses less digits than its factorization.

1255776531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 967.

The product of its digits is 220500, while the sum is 42.

The square root of 1255776531 is about 35436.9373817772. The cubic root of 1255776531 is about 1078.8741499780.

The spelling of 1255776531 in words is "one billion, two hundred fifty-five million, seven hundred seventy-six thousand, five hundred thirty-one".