12492661 has 4 divisors (see below), whose sum is σ = 12783232. Its totient is φ = 12202092.

The previous prime is 12492631. The next prime is 12492679. The reversal of 12492661 is 16629421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16629421 = 79 ⋅210499.

It is a cyclic number.

It is not a de Polignac number, because 12492661 - 2²³ = 4104053 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 (12492631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145221 + ... + 145306.

It is an arithmetic number, because the mean of its divisors is an integer number (3195808).

Almost surely, 2^12492661 is an apocalyptic number.

It is an amenable number.

12492661 is a deficient number, since it is larger than the sum of its proper divisors (290571).

12492661 is an equidigital number, since it uses as much as digits as its factorization.

12492661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290570.

The product of its digits is 5184, while the sum is 31.

The square root of 12492661 is about 3534.4958622129. The cubic root of 12492661 is about 232.0340132949.

The spelling of 12492661 in words is "twelve million, four hundred ninety-two thousand, six hundred sixty-one".