11561507 has 2 divisors, whose sum is σ = 11561508. Its totient is φ = 11561506.

The previous prime is 11561489. The next prime is 11561509. The reversal of 11561507 is 70516511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11561507 - 2¹⁶ = 11495971 is a prime.

It is a super-2 number, since 2×11561507² = 267336888222098, which contains 22 as substring.

Together with 11561509, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11561509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5780753 + 5780754.

It is an arithmetic number, because the mean of its divisors is an integer number (5780754).

Almost surely, 2^11561507 is an apocalyptic number.

11561507 is a deficient number, since it is larger than the sum of its proper divisors (1).

11561507 is an equidigital number, since it uses as much as digits as its factorization.

11561507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1050, while the sum is 26.

The square root of 11561507 is about 3400.2216104248. The cubic root of 11561507 is about 226.1195689111.

The spelling of 11561507 in words is "eleven million, five hundred sixty-one thousand, five hundred seven".