1256153601 has 16 divisors (see below), whose sum is σ = 1705648320. Its totient is φ = 822087360.

The previous prime is 1256153597. The next prime is 1256153603. The reversal of 1256153601 is 1063516521.

It is not a de Polignac number, because 1256153601 - 2² = 1256153597 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1256153603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132231 + ... + 141411.

It is an arithmetic number, because the mean of its divisors is an integer number (106603020).

Almost surely, 2^1256153601 is an apocalyptic number.

It is an amenable number.

1256153601 is a deficient number, since it is larger than the sum of its proper divisors (449494719).

1256153601 is an equidigital number, since it uses as much as digits as its factorization.

1256153601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10016.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 1256153601 is about 35442.2572785651. The cubic root of 1256153601 is about 1078.9821231072.

The spelling of 1256153601 in words is "one billion, two hundred fifty-six million, one hundred fifty-three thousand, six hundred one".