1161887525 has 36 divisors (see below), whose sum is σ = 1610217252. Its totient is φ = 828679680.

The previous prime is 1161887521. The next prime is 1161887543. The reversal of 1161887525 is 5257881611.

It can be written as a sum of positive squares in 6 ways, for example, as 156300004 + 1005587521 = 12502^2 + 31711^2 .

It is not a de Polignac number, because 1161887525 - 2² = 1161887521 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161887521) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 149639 + ... + 157211.

It is an arithmetic number, because the mean of its divisors is an integer number (44728257).

Almost surely, 2^1161887525 is an apocalyptic number.

It is an amenable number.

1161887525 is a deficient number, since it is larger than the sum of its proper divisors (448329727).

1161887525 is a wasteful number, since it uses less digits than its factorization.

1161887525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7638 (or 7614 counting only the distinct ones).

The product of its digits is 134400, while the sum is 44.

The square root of 1161887525 is about 34086.4712899414. The cubic root of 1161887525 is about 1051.2871667281.

The spelling of 1161887525 in words is "one billion, one hundred sixty-one million, eight hundred eighty-seven thousand, five hundred twenty-five".