1255991392 has 48 divisors (see below), whose sum is σ = 2578383360. Its totient is φ = 601509888.

The previous prime is 1255991389. The next prime is 1255991411. The reversal of 1255991392 is 2931995521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112528 + ... + 123184.

It is an arithmetic number, because the mean of its divisors is an integer number (53716320).

Almost surely, 2^1255991392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1255991392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1289191680).

1255991392 is an abundant number, since it is smaller than the sum of its proper divisors (1322391968).

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

1255991392 is a wasteful number, since it uses less digits than its factorization.

1255991392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10823 (or 10815 counting only the distinct ones).

The product of its digits is 218700, while the sum is 46.

The square root of 1255991392 is about 35439.9688487448. The cubic root of 1255991392 is about 1078.9356775810.

The spelling of 1255991392 in words is "one billion, two hundred fifty-five million, nine hundred ninety-one thousand, three hundred ninety-two".