1256474268 has 432 divisors, whose sum is σ = 4238567424. Its totient is φ = 323326080.

The previous prime is 1256474257. The next prime is 1256474269. The reversal of 1256474268 is 8624746521.

1256474268 is a `hidden beast` number, since 12 + 564 + 74 + 2 + 6 + 8 = 666.

It is a super-2 number, since 2×1256474268² = 3157455172292271648, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256474269) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 33958746 + ... + 33958782.

Almost surely, 2^1256474268 is an apocalyptic number.

1256474268 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1256474268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2119283712).

1256474268 is an abundant number, since it is smaller than the sum of its proper divisors (2982093156).

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

1256474268 is a wasteful number, since it uses less digits than its factorization.

1256474268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124 (or 103 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 1256474268 is about 35446.7807847201. The cubic root of 1256474268 is about 1079.0739283671.

The spelling of 1256474268 in words is "one billion, two hundred fifty-six million, four hundred seventy-four thousand, two hundred sixty-eight".