11577521 has 2 divisors, whose sum is σ = 11577522. Its totient is φ = 11577520.

The previous prime is 11577499. The next prime is 11577571. The reversal of 11577521 is 12577511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6195121 + 5382400 = 2489^2 + 2320^2 .

It is a cyclic number.

It is not a de Polignac number, because 11577521 - 2²² = 7383217 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11577571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5788760 + 5788761.

It is an arithmetic number, because the mean of its divisors is an integer number (5788761).

Almost surely, 2^11577521 is an apocalyptic number.

It is an amenable number.

11577521 is a deficient number, since it is larger than the sum of its proper divisors (1).

11577521 is an equidigital number, since it uses as much as digits as its factorization.

11577521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2450, while the sum is 29.

The square root of 11577521 is about 3402.5756420688. The cubic root of 11577521 is about 226.2239211723.

The spelling of 11577521 in words is "eleven million, five hundred seventy-seven thousand, five hundred twenty-one".