1161522625 has 16 divisors (see below), whose sum is σ = 1452823632. Its totient is φ = 927139200.

The previous prime is 1161522623. The next prime is 1161522629. The reversal of 1161522625 is 5262251611.

It can be written as a sum of positive squares in 8 ways, for example, as 11498881 + 1150023744 = 3391^2 + 33912^2 .

It is not a de Polignac number, because 1161522625 - 2¹ = 1161522623 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1161522623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46959 + ... + 67291.

It is an arithmetic number, because the mean of its divisors is an integer number (90801477).

Almost surely, 2^1161522625 is an apocalyptic number.

It is an amenable number.

1161522625 is a deficient number, since it is larger than the sum of its proper divisors (291301007).

1161522625 is an equidigital number, since it uses as much as digits as its factorization.

1161522625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20805 (or 20795 counting only the distinct ones).

The product of its digits is 7200, while the sum is 31.

The square root of 1161522625 is about 34081.1183061824. The cubic root of 1161522625 is about 1051.1771001783.

The spelling of 1161522625 in words is "one billion, one hundred sixty-one million, five hundred twenty-two thousand, six hundred twenty-five".