12511967 has 4 divisors (see below), whose sum is σ = 13474440. Its totient is φ = 11549496.

The previous prime is 12511951. The next prime is 12511969. The reversal of 12511967 is 76911521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76911521 = 1367 ⋅56263.

It is a cyclic number.

It is not a de Polignac number, because 12511967 - 2⁴ = 12511951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12511969) 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, 481217 + ... + 481242.

It is an arithmetic number, because the mean of its divisors is an integer number (3368610).

Almost surely, 2^12511967 is an apocalyptic number.

12511967 is a deficient number, since it is larger than the sum of its proper divisors (962473).

12511967 is an equidigital number, since it uses as much as digits as its factorization.

12511967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962472.

The product of its digits is 3780, while the sum is 32.

The square root of 12511967 is about 3537.2258904401. The cubic root of 12511967 is about 232.1534792502.

The spelling of 12511967 in words is "twelve million, five hundred eleven thousand, nine hundred sixty-seven".