1161445525 has 12 divisors (see below), whose sum is σ = 1524910212. Its totient is φ = 874499840.

The previous prime is 1161445511. The next prime is 1161445531. The reversal of 1161445525 is 5255441611.

It can be written as a sum of positive squares in 6 ways, for example, as 36312676 + 1125132849 = 6026^2 + 33543^2 .

It is not a de Polignac number, because 1161445525 - 2²⁷ = 1027227797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1365982 + ... + 1366831.

It is an arithmetic number, because the mean of its divisors is an integer number (127075851).

Almost surely, 2^1161445525 is an apocalyptic number.

It is an amenable number.

1161445525 is a deficient number, since it is larger than the sum of its proper divisors (363464687).

1161445525 is a wasteful number, since it uses less digits than its factorization.

1161445525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2732840 (or 2732835 counting only the distinct ones).

The product of its digits is 24000, while the sum is 34.

The square root of 1161445525 is about 34079.9871625563. The cubic root of 1161445525 is about 1051.1538411831.

The spelling of 1161445525 in words is "one billion, one hundred sixty-one million, four hundred forty-five thousand, five hundred twenty-five".