12889961 has 16 divisors (see below), whose sum is σ = 16421760. Its totient is φ = 9849600.

The previous prime is 12889957. The next prime is 12889963. The reversal of 12889961 is 16998821.

It is not a de Polignac number, because 12889961 - 2² = 12889957 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12889963) 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 15 ways as a sum of consecutive naturals, for example, 590 + ... + 5111.

It is an arithmetic number, because the mean of its divisors is an integer number (1026360).

Almost surely, 2^12889961 is an apocalyptic number.

It is an amenable number.

12889961 is a deficient number, since it is larger than the sum of its proper divisors (3531799).

12889961 is a wasteful number, since it uses less digits than its factorization.

12889961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5744.

The product of its digits is 62208, while the sum is 44.

The square root of 12889961 is about 3590.2591828446. The cubic root of 12889961 is about 234.4681559407.

The spelling of 12889961 in words is "twelve million, eight hundred eighty-nine thousand, nine hundred sixty-one".