12577561 has 8 divisors (see below), whose sum is σ = 13233600. Its totient is φ = 11936400.

The previous prime is 12577531. The next prime is 12577567. The reversal of 12577561 is 16577521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12577561 - 2⁹ = 12577049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12577567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1965 + ... + 5386.

It is an arithmetic number, because the mean of its divisors is an integer number (1654200).

Almost surely, 2^12577561 is an apocalyptic number.

It is an amenable number.

12577561 is a deficient number, since it is larger than the sum of its proper divisors (656039).

12577561 is an equidigital number, since it uses as much as digits as its factorization.

12577561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7439.

The product of its digits is 14700, while the sum is 34.

The square root of 12577561 is about 3546.4857253343. The cubic root of 12577561 is about 232.5584606528.

The spelling of 12577561 in words is "twelve million, five hundred seventy-seven thousand, five hundred sixty-one".