1145561125 has 8 divisors (see below), whose sum is σ = 1429660440. Its totient is φ = 916448800.

The previous prime is 1145561113. The next prime is 1145561149. The reversal of 1145561125 is 5211655411.

It can be written as a sum of positive squares in 4 ways, for example, as 9409 + 1145551716 = 97^2 + 33846^2 .

It is not a de Polignac number, because 1145561125 - 2⁹ = 1145560613 is a prime.

It is a super-2 number, since 2×1145561125² = 2624620582222531250, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4582120 + ... + 4582369.

It is an arithmetic number, because the mean of its divisors is an integer number (178707555).

Almost surely, 2^1145561125 is an apocalyptic number.

It is an amenable number.

1145561125 is a deficient number, since it is larger than the sum of its proper divisors (284099315).

1145561125 is an frugal number, since it uses more digits than its factorization.

1145561125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9164504 (or 9164494 counting only the distinct ones).

The product of its digits is 6000, while the sum is 31.

The square root of 1145561125 is about 33846.1389969373. The cubic root of 1145561125 is about 1046.3398258136.

The spelling of 1145561125 in words is "one billion, one hundred forty-five million, five hundred sixty-one thousand, one hundred twenty-five".