12625691 has 4 divisors (see below), whose sum is σ = 13596912. Its totient is φ = 11654472.

The previous prime is 12625687. The next prime is 12625693. The reversal of 12625691 is 19652621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19652621 = 113 ⋅173917.

It is a cyclic number.

It is not a de Polignac number, because 12625691 - 2² = 12625687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12625693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 485591 + ... + 485616.

It is an arithmetic number, because the mean of its divisors is an integer number (3399228).

Almost surely, 2^12625691 is an apocalyptic number.

12625691 is a deficient number, since it is larger than the sum of its proper divisors (971221).

12625691 is an equidigital number, since it uses as much as digits as its factorization.

12625691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971220.

The product of its digits is 6480, while the sum is 32.

The square root of 12625691 is about 3553.2648367382. The cubic root of 12625691 is about 232.8547234890.

The spelling of 12625691 in words is "twelve million, six hundred twenty-five thousand, six hundred ninety-one".