12577409 has 4 divisors (see below), whose sum is σ = 13544916. Its totient is φ = 11609904.

The previous prime is 12577403. The next prime is 12577421. The reversal of 12577409 is 90477521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5895184 + 6682225 = 2428^2 + 2585^2 .

It is a cyclic number.

It is not a de Polignac number, because 12577409 - 2⁴ = 12577393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12577403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 483734 + ... + 483759.

It is an arithmetic number, because the mean of its divisors is an integer number (3386229).

Almost surely, 2^12577409 is an apocalyptic number.

It is an amenable number.

12577409 is a deficient number, since it is larger than the sum of its proper divisors (967507).

12577409 is an equidigital number, since it uses as much as digits as its factorization.

12577409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 967506.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 12577409 is about 3546.4642956048. The cubic root of 12577409 is about 232.5575238250.

The spelling of 12577409 in words is "twelve million, five hundred seventy-seven thousand, four hundred nine".