1125642825 has 36 divisors (see below), whose sum is σ = 2090834928. Its totient is φ = 600339600.

The previous prime is 1125642787. The next prime is 1125642851. The reversal of 1125642825 is 5282465211.

1125642825 is a `hidden beast` number, since 1 + 1 + 2 + 5 + 642 + 8 + 2 + 5 = 666.

It is not a de Polignac number, because 1125642825 - 2⁷ = 1125642697 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1125642825.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 86571 + ... + 98720.

It is an arithmetic number, because the mean of its divisors is an integer number (58078748).

Almost surely, 2^1125642825 is an apocalyptic number.

1125642825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1125642825 is a deficient number, since it is larger than the sum of its proper divisors (965192103).

1125642825 is an equidigital number, since it uses as much as digits as its factorization.

1125642825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185316 (or 185299 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 1125642825 is about 33550.6009633211. The cubic root of 1125642825 is about 1040.2399671238.

The spelling of 1125642825 in words is "one billion, one hundred twenty-five million, six hundred forty-two thousand, eight hundred twenty-five".