1256993262 has 64 divisors (see below), whose sum is σ = 3252648960. Its totient is φ = 352359072.

The previous prime is 1256993249. The next prime is 1256993281. The reversal of 1256993262 is 2623996521.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11338 + ... + 51405.

It is an arithmetic number, because the mean of its divisors is an integer number (50822640).

Almost surely, 2^1256993262 is an apocalyptic number.

1256993262 is an abundant number, since it is smaller than the sum of its proper divisors (1995655698).

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

1256993262 is a wasteful number, since it uses less digits than its factorization.

1256993262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62814 (or 62808 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The square root of 1256993262 is about 35454.1007783303. The cubic root of 1256993262 is about 1079.2224805017. Note that the first 3 decimals are identical.

The spelling of 1256993262 in words is "one billion, two hundred fifty-six million, nine hundred ninety-three thousand, two hundred sixty-two".