1125309557 has 4 divisors (see below), whose sum is σ = 1127995680. Its totient is φ = 1122623436.

The previous prime is 1125309551. The next prime is 1125309587. The reversal of 1125309557 is 7559035211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1125309557 - 2⁴ = 1125309541 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 1125309557.

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, 1342433 + ... + 1343270.

It is an arithmetic number, because the mean of its divisors is an integer number (281998920).

Almost surely, 2^1125309557 is an apocalyptic number.

It is an amenable number.

1125309557 is a deficient number, since it is larger than the sum of its proper divisors (2686123).

1125309557 is an equidigital number, since it uses as much as digits as its factorization.

1125309557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2686122.

The product of its (nonzero) digits is 47250, while the sum is 38.

The square root of 1125309557 is about 33545.6339483993. The cubic root of 1125309557 is about 1040.1372960382.

The spelling of 1125309557 in words is "one billion, one hundred twenty-five million, three hundred nine thousand, five hundred fifty-seven".