1256256253 has 8 divisors (see below), whose sum is σ = 1435966272. Its totient is φ = 1076607456.

The previous prime is 1256256247. The next prime is 1256256257. The reversal of 1256256253 is 3526526521.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1256256253 is a prime.

It is a super-3 number, since 3×1256256253³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256256257) 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, 44001 + ... + 66697.

It is an arithmetic number, because the mean of its divisors is an integer number (179495784).

Almost surely, 2^1256256253 is an apocalyptic number.

It is an amenable number.

1256256253 is a deficient number, since it is larger than the sum of its proper divisors (179710019).

1256256253 is an equidigital number, since it uses as much as digits as its factorization.

1256256253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30611.

The product of its digits is 108000, while the sum is 37.

The square root of 1256256253 is about 35443.7054073075. The cubic root of 1256256253 is about 1079.0115135300.

The spelling of 1256256253 in words is "one billion, two hundred fifty-six million, two hundred fifty-six thousand, two hundred fifty-three".