1125309556 has 12 divisors (see below), whose sum is σ = 2250619168. Its totient is φ = 482275512.

The previous prime is 1125309551. The next prime is 1125309587. The reversal of 1125309556 is 6559035211.

1125309556 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125309551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20094786 + ... + 20094841.

Almost surely, 2^1125309556 is an apocalyptic number.

It is an amenable number.

1125309556 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1125309556 is a wasteful number, since it uses less digits than its factorization.

1125309556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40189638 (or 40189636 counting only the distinct ones).

The product of its (nonzero) digits is 40500, while the sum is 37.

The square root of 1125309556 is about 33545.6339334942. The cubic root of 1125309556 is about 1040.1372957301.

The spelling of 1125309556 in words is "one billion, one hundred twenty-five million, three hundred nine thousand, five hundred fifty-six".