1256623652 has 12 divisors (see below), whose sum is σ = 2225587056. Its totient is φ = 620741640.

The previous prime is 1256623639. The next prime is 1256623673. The reversal of 1256623652 is 2563266521.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1892174 + ... + 1892837.

It is an arithmetic number, because the mean of its divisors is an integer number (185465588).

Almost surely, 2^1256623652 is an apocalyptic number.

It is an amenable number.

1256623652 is a deficient number, since it is larger than the sum of its proper divisors (968963404).

1256623652 is a wasteful number, since it uses less digits than its factorization.

1256623652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3785098 (or 3785096 counting only the distinct ones).

The product of its digits is 129600, while the sum is 38.

The square root of 1256623652 is about 35448.8878810041. The cubic root of 1256623652 is about 1079.1166908801.

The spelling of 1256623652 in words is "one billion, two hundred fifty-six million, six hundred twenty-three thousand, six hundred fifty-two".