1139249256 has 64 divisors (see below), whose sum is σ = 2961722880. Its totient is φ = 364784640.

The previous prime is 1139249239. The next prime is 1139249261. The reversal of 1139249256 is 6529429311.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96340 + ... + 107516.

It is an arithmetic number, because the mean of its divisors is an integer number (46276920).

Almost surely, 2^1139249256 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 1139249256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1480861440).

1139249256 is an abundant number, since it is smaller than the sum of its proper divisors (1822473624).

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

1139249256 is a wasteful number, since it uses less digits than its factorization.

1139249256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11354 (or 11350 counting only the distinct ones).

The product of its digits is 116640, while the sum is 42.

The square root of 1139249256 is about 33752.7666421584. The cubic root of 1139249256 is about 1044.4145606291.

The spelling of 1139249256 in words is "one billion, one hundred thirty-nine million, two hundred forty-nine thousand, two hundred fifty-six".