12606491 has 4 divisors (see below), whose sum is σ = 13013184. Its totient is φ = 12199800.

The previous prime is 12606467. The next prime is 12606497. The reversal of 12606491 is 19460621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19460621 = 157 ⋅123953.

It is a cyclic number.

It is not a de Polignac number, because 12606491 - 2⁶ = 12606427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12606497) 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, 203300 + ... + 203361.

It is an arithmetic number, because the mean of its divisors is an integer number (3253296).

Almost surely, 2^12606491 is an apocalyptic number.

12606491 is a deficient number, since it is larger than the sum of its proper divisors (406693).

12606491 is an equidigital number, since it uses as much as digits as its factorization.

12606491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406692.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 12606491 is about 3550.5620681802. The cubic root of 12606491 is about 232.7366288603.

The spelling of 12606491 in words is "twelve million, six hundred six thousand, four hundred ninety-one".