1161514561 has 9 divisors (see below), whose sum is σ = 1174227721. Its totient is φ = 1148938672.

The previous prime is 1161514537. The next prime is 1161514567. The reversal of 1161514561 is 1654151611.

The square root of 1161514561 is 34081.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 943656961 + 217857600 = 30719^2 + 14760^2 .

It is not a de Polignac number, because 1161514561 - 2⁹ = 1161514049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1161514567) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5895915 + ... + 5896111.

Almost surely, 2^1161514561 is an apocalyptic number.

1161514561 is the 34081-st square number.

1161514561 is the 17041-st centered octagonal number.

It is an amenable number.

1161514561 is a deficient number, since it is larger than the sum of its proper divisors (12713160).

1161514561 is an frugal number, since it uses more digits than its factorization.

1161514561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740 (or 370 counting only the distinct ones).

The product of its digits is 3600, while the sum is 31.

The cubic root of 1161514561 is about 1051.1746675347.

Multiplying 1161514561 by its product of digits (3600), we get a square (4181452419600 = 2044860²).

The spelling of 1161514561 in words is "one billion, one hundred sixty-one million, five hundred fourteen thousand, five hundred sixty-one".