1256013083 has 8 divisors (see below), whose sum is σ = 1354399200. Its totient is φ = 1157879808.

The previous prime is 1256013079. The next prime is 1256013127. The reversal of 1256013083 is 3803106521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1256013083 - 2² = 1256013079 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1256013053) 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, 52823 + ... + 72816.

It is an arithmetic number, because the mean of its divisors is an integer number (169299900).

Almost surely, 2^1256013083 is an apocalyptic number.

1256013083 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1256013083 is a deficient number, since it is larger than the sum of its proper divisors (98386117).

1256013083 is a wasteful number, since it uses less digits than its factorization.

1256013083 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126421.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1256013083 is about 35440.2748719589. The cubic root of 1256013083 is about 1078.9418886265.

The spelling of 1256013083 in words is "one billion, two hundred fifty-six million, thirteen thousand, eighty-three".