1125165231 has 12 divisors (see below), whose sum is σ = 1625543920. Its totient is φ = 749969280.

The previous prime is 1125165211. The next prime is 1125165233. The reversal of 1125165231 is 1325615211.

1125165231 is a `hidden beast` number, since 1 + 1 + 2 + 5 + 1 + 652 + 3 + 1 = 666.

It is not a de Polignac number, because 1125165231 - 2¹³ = 1125157039 is a prime.

It is a super-2 number, since 2×1125165231² = 2531993594102566722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1125165195 and 1125165204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125165233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65790 + ... + 81108.

Almost surely, 2^1125165231 is an apocalyptic number.

1125165231 is a deficient number, since it is larger than the sum of its proper divisors (500378689).

1125165231 is a wasteful number, since it uses less digits than its factorization.

1125165231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23486 (or 23483 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 1125165231 is about 33543.4826903826. The cubic root of 1125165231 is about 1040.0928267119.

The spelling of 1125165231 in words is "one billion, one hundred twenty-five million, one hundred sixty-five thousand, two hundred thirty-one".