1255431506 has 16 divisors (see below), whose sum is σ = 2152746816. Its totient is φ = 537897456.

The previous prime is 1255431493. The next prime is 1255431509. The reversal of 1255431506 is 6051345521.

It is a super-2 number, since 2×1255431506² = 3152216532514856072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1255431509) 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, 54605 + ... + 74111.

It is an arithmetic number, because the mean of its divisors is an integer number (134546676).

Almost surely, 2^1255431506 is an apocalyptic number.

1255431506 is a deficient number, since it is larger than the sum of its proper divisors (897315310).

1255431506 is a wasteful number, since it uses less digits than its factorization.

1255431506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24113.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 1255431506 is about 35432.0688924596. The cubic root of 1255431506 is about 1078.7753339226.

The spelling of 1255431506 in words is "one billion, two hundred fifty-five million, four hundred thirty-one thousand, five hundred six".