12892661 has 4 divisors (see below), whose sum is σ = 12912492. Its totient is φ = 12872832.

The previous prime is 12892657. The next prime is 12892669. The reversal of 12892661 is 16629821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1876900 + 11015761 = 1370^2 + 3319^2 .

It is a cyclic number.

It is not a de Polignac number, because 12892661 - 2² = 12892657 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 (12892669) 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, 8906 + ... + 10251.

It is an arithmetic number, because the mean of its divisors is an integer number (3228123).

Almost surely, 2^12892661 is an apocalyptic number.

It is an amenable number.

12892661 is a deficient number, since it is larger than the sum of its proper divisors (19831).

12892661 is an equidigital number, since it uses as much as digits as its factorization.

12892661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19830.

The product of its digits is 10368, while the sum is 35.

The square root of 12892661 is about 3590.6351805774. The cubic root of 12892661 is about 234.4845257814.

The spelling of 12892661 in words is "twelve million, eight hundred ninety-two thousand, six hundred sixty-one".