12890518 has 4 divisors (see below), whose sum is σ = 19335780. Its totient is φ = 6445258.

The previous prime is 12890491. The next prime is 12890543. The reversal of 12890518 is 81509821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81509821 = 2999 ⋅27179.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3222628 + ... + 3222631.

It is an arithmetic number, because the mean of its divisors is an integer number (4833945).

Almost surely, 2^12890518 is an apocalyptic number.

12890518 is a deficient number, since it is larger than the sum of its proper divisors (6445262).

12890518 is an equidigital number, since it uses as much as digits as its factorization.

12890518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6445261.

The product of its (nonzero) digits is 5760, while the sum is 34.

The square root of 12890518 is about 3590.3367530080. The cubic root of 12890518 is about 234.4715331653.

The spelling of 12890518 in words is "twelve million, eight hundred ninety thousand, five hundred eighteen".