12892081 has 4 divisors (see below), whose sum is σ = 13206564. Its totient is φ = 12577600.

The previous prime is 12892079. The next prime is 12892093. The reversal of 12892081 is 18029821.

It is a happy number.

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 7203856 + 5688225 = 2684^2 + 2385^2 .

It is a cyclic number.

It is not a de Polignac number, because 12892081 - 2¹ = 12892079 is a prime.

It is a super-2 number, since 2×12892081² = 332411505021122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12892181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157180 + ... + 157261.

It is an arithmetic number, because the mean of its divisors is an integer number (3301641).

Almost surely, 2^12892081 is an apocalyptic number.

It is an amenable number.

12892081 is a deficient number, since it is larger than the sum of its proper divisors (314483).

12892081 is an equidigital number, since it uses as much as digits as its factorization.

12892081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314482.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 12892081 is about 3590.5544140146. The cubic root of 12892081 is about 234.4810094898.

The spelling of 12892081 in words is "twelve million, eight hundred ninety-two thousand, eighty-one".