12605971 has 4 divisors (see below), whose sum is σ = 14406832. Its totient is φ = 10805112.

The previous prime is 12605969. The next prime is 12605977. The reversal of 12605971 is 17950621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17950621 = 13 ⋅1380817.

It is a cyclic number.

It is not a de Polignac number, because 12605971 - 2¹ = 12605969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12605977) 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, 900420 + ... + 900433.

It is an arithmetic number, because the mean of its divisors is an integer number (3601708).

Almost surely, 2^12605971 is an apocalyptic number.

12605971 is a deficient number, since it is larger than the sum of its proper divisors (1800861).

12605971 is an equidigital number, since it uses as much as digits as its factorization.

12605971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1800860.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 12605971 is about 3550.4888395825. The cubic root of 12605971 is about 232.7334287969.

The spelling of 12605971 in words is "twelve million, six hundred five thousand, nine hundred seventy-one".