1156612081 has 9 divisors (see below), whose sum is σ = 1175586073. Its totient is φ = 1137941140.

The previous prime is 1156612069. The next prime is 1156612097. The reversal of 1156612081 is 1802166511.

The square root of 1156612081 is 34009.

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

It is not a de Polignac number, because 1156612081 - 2²⁹ = 619741169 is a prime.

It is a super-2 number, since 2×1156612081² = 2675503011830301122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1156612001) 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, 2414400 + ... + 2414878.

Almost surely, 2^1156612081 is an apocalyptic number.

1156612081 is the 34009-th square number.

1156612081 is the 17005-th centered octagonal number.

It is an amenable number.

1156612081 is a deficient number, since it is larger than the sum of its proper divisors (18973992).

1156612081 is an frugal number, since it uses more digits than its factorization.

1156612081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100 (or 550 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 31.

The cubic root of 1156612081 is about 1049.6936615034.

Adding to 1156612081 its reverse (1802166511), we get a palindrome (2958778592).

The spelling of 1156612081 in words is "one billion, one hundred fifty-six million, six hundred twelve thousand, eighty-one".