1256797436 has 12 divisors (see below), whose sum is σ = 2253039600. Its totient is φ = 613071840.

The previous prime is 1256797433. The next prime is 1256797469. The reversal of 1256797436 is 6347976521.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256797433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3831536 + ... + 3831863.

It is an arithmetic number, because the mean of its divisors is an integer number (187753300).

Almost surely, 2^1256797436 is an apocalyptic number.

It is an amenable number.

1256797436 is a deficient number, since it is larger than the sum of its proper divisors (996242164).

1256797436 is a wasteful number, since it uses less digits than its factorization.

1256797436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7663444 (or 7663442 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 50.

The square root of 1256797436 is about 35451.3389874064. The cubic root of 1256797436 is about 1079.1664338482.

The spelling of 1256797436 in words is "one billion, two hundred fifty-six million, seven hundred ninety-seven thousand, four hundred thirty-six".