256266126 has 48 divisors (see below), whose sum is σ = 604986480. Its totient is φ = 80392320.

The previous prime is 256266103. The next prime is 256266133. The reversal of 256266126 is 621662652.

256266126 is a `hidden beast` number, since 2 + 5 + 626 + 6 + 1 + 26 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7396 + ... + 23816.

It is an arithmetic number, because the mean of its divisors is an integer number (12603885).

Almost surely, 2^256266126 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256266126, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (302493240).

256266126 is an abundant number, since it is smaller than the sum of its proper divisors (348720354).

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

256266126 is a wasteful number, since it uses less digits than its factorization.

256266126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16466 (or 16443 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 256266126 is about 16008.3142772748. The cubic root of 256266126 is about 635.1803699491.

The spelling of 256266126 in words is "two hundred fifty-six million, two hundred sixty-six thousand, one hundred twenty-six".