1255001856 has 36 divisors (see below), whose sum is σ = 3340137192. Its totient is φ = 418333696.

The previous prime is 1255001833. The next prime is 1255001887. The reversal of 1255001856 is 6581005521.

It is a congruent number.

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, 816291 + ... + 817826.

Almost surely, 2^1255001856 is an apocalyptic number.

1255001856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1255001856 is an abundant number, since it is smaller than the sum of its proper divisors (2085135336).

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

1255001856 is an equidigital number, since it uses as much as digits as its factorization.

1255001856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1634136 (or 1634122 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 33.

The square root of 1255001856 is about 35426.0053632921. The cubic root of 1255001856 is about 1078.6522557341.

The spelling of 1255001856 in words is "one billion, two hundred fifty-five million, one thousand, eight hundred fifty-six".