1256313522 has 16 divisors (see below), whose sum is σ = 2525383872. Its totient is φ = 416645040.

The previous prime is 1256313511. The next prime is 1256313523. The reversal of 1256313522 is 2253136521.

It is a self number, because there is not a number n which added to its sum of digits gives 1256313522.

It is not an unprimeable number, because it can be changed into a prime (1256313523) 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, 530254 + ... + 532617.

It is an arithmetic number, because the mean of its divisors is an integer number (157836492).

Almost surely, 2^1256313522 is an apocalyptic number.

1256313522 is an abundant number, since it is smaller than the sum of its proper divisors (1269070350).

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

1256313522 is a wasteful number, since it uses less digits than its factorization.

1256313522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063073.

The product of its digits is 10800, while the sum is 30.

The square root of 1256313522 is about 35444.5132848513. The cubic root of 1256313522 is about 1079.0279095933.

The spelling of 1256313522 in words is "one billion, two hundred fifty-six million, three hundred thirteen thousand, five hundred twenty-two".