1161365525 has 6 divisors (see below), whose sum is σ = 1440093282. Its totient is φ = 929092400.

The previous prime is 1161365507. The next prime is 1161365533. The reversal of 1161365525 is 5255631611.

It can be written as a sum of positive squares in 3 ways, for example, as 392911684 + 768453841 = 19822^2 + 27721^2 .

It is not a de Polignac number, because 1161365525 - 2⁸ = 1161365269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23227286 + ... + 23227335.

It is an arithmetic number, because the mean of its divisors is an integer number (240015547).

Almost surely, 2^1161365525 is an apocalyptic number.

It is an amenable number.

1161365525 is a deficient number, since it is larger than the sum of its proper divisors (278727757).

1161365525 is an equidigital number, since it uses as much as digits as its factorization.

1161365525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46454631 (or 46454626 counting only the distinct ones).

The product of its digits is 27000, while the sum is 35.

The square root of 1161365525 is about 34078.8134329821. The cubic root of 1161365525 is about 1051.1297062477.

The spelling of 1161365525 in words is "one billion, one hundred sixty-one million, three hundred sixty-five thousand, five hundred twenty-five".