256171126 has 8 divisors (see below), whose sum is σ = 386614584. Its totient is φ = 127299600.

The previous prime is 256171109. The next prime is 256171127. The reversal of 256171126 is 621171652.

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

It is a super-2 number, since 2×256171126² = 131247291592215752, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256171127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 392575 + ... + 393226.

It is an arithmetic number, because the mean of its divisors is an integer number (48326823).

Almost surely, 2^256171126 is an apocalyptic number.

256171126 is a deficient number, since it is larger than the sum of its proper divisors (130443458).

256171126 is a wasteful number, since it uses less digits than its factorization.

256171126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785966.

The product of its digits is 5040, while the sum is 31.

The square root of 256171126 is about 16005.3467941185. The cubic root of 256171126 is about 635.1018713533.

The spelling of 256171126 in words is "two hundred fifty-six million, one hundred seventy-one thousand, one hundred twenty-six".