12971619 has 12 divisors (see below), whose sum is σ = 18873400. Its totient is φ = 8584704.

The previous prime is 12971617. The next prime is 12971641. The reversal of 12971619 is 91617921.

It is not a de Polignac number, because 12971619 - 2¹ = 12971617 is a prime.

It is a super-2 number, since 2×12971619² = 336525798962322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12971611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3934 + ... + 6435.

Almost surely, 2^12971619 is an apocalyptic number.

12971619 is a deficient number, since it is larger than the sum of its proper divisors (5901781).

12971619 is a wasteful number, since it uses less digits than its factorization.

12971619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10514 (or 10511 counting only the distinct ones).

The product of its digits is 6804, while the sum is 36.

The square root of 12971619 is about 3601.6133884691. The cubic root of 12971619 is about 234.9622332548.

It can be divided in two parts, 1297 and 1619, that added together give a square (2916 = 54²).

The spelling of 12971619 in words is "twelve million, nine hundred seventy-one thousand, six hundred nineteen".