1256872200 has 48 divisors (see below), whose sum is σ = 3896305680. Its totient is φ = 335165760.

The previous prime is 1256872193. The next prime is 1256872223. The reversal of 1256872200 is 22786521.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1046794 + ... + 1047993.

It is an arithmetic number, because the mean of its divisors is an integer number (81173035).

Almost surely, 2^1256872200 is an apocalyptic number.

1256872200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1256872200 is an abundant number, since it is smaller than the sum of its proper divisors (2639433480).

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

1256872200 is a wasteful number, since it uses less digits than its factorization.

1256872200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2094806 (or 2094797 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 1256872200 is about 35452.3934311916. The cubic root of 1256872200 is about 1079.1878324702.

The spelling of 1256872200 in words is "one billion, two hundred fifty-six million, eight hundred seventy-two thousand, two hundred".