12578961 has 4 divisors (see below), whose sum is σ = 16771952. Its totient is φ = 8385972.

The previous prime is 12578959. The next prime is 12578983. The reversal of 12578961 is 16987521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12578961 - 2¹ = 12578959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12578911) 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, 2096491 + ... + 2096496.

It is an arithmetic number, because the mean of its divisors is an integer number (4192988).

Almost surely, 2^12578961 is an apocalyptic number.

It is an amenable number.

12578961 is a deficient number, since it is larger than the sum of its proper divisors (4192991).

12578961 is an equidigital number, since it uses as much as digits as its factorization.

12578961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4192990.

The product of its digits is 30240, while the sum is 39.

The square root of 12578961 is about 3546.6830983329. The cubic root of 12578961 is about 232.5670889755.

The spelling of 12578961 in words is "twelve million, five hundred seventy-eight thousand, nine hundred sixty-one".