1125808739 has 16 divisors (see below), whose sum is σ = 1282417920. Its totient is φ = 978905760.

The previous prime is 1125808711. The next prime is 1125808751. The reversal of 1125808739 is 9378085211.

It is a cyclic number.

It is not a de Polignac number, because 1125808739 - 2²⁴ = 1109031523 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1125808739.

It is not an unprimeable number, because it can be changed into a prime (1125808769) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17642 + ... + 50624.

It is an arithmetic number, because the mean of its divisors is an integer number (80151120).

Almost surely, 2^1125808739 is an apocalyptic number.

1125808739 is a deficient number, since it is larger than the sum of its proper divisors (156609181).

1125808739 is a wasteful number, since it uses less digits than its factorization.

1125808739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33130.

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 1125808739 is about 33553.0734657796. The cubic root of 1125808739 is about 1040.2910732980.

The spelling of 1125808739 in words is "one billion, one hundred twenty-five million, eight hundred eight thousand, seven hundred thirty-nine".