12504891 has 16 divisors (see below), whose sum is σ = 19111424. Its totient is φ = 7124544.

The previous prime is 12504889. The next prime is 12504917. The reversal of 12504891 is 19840521.

It is a happy number.

It is not a de Polignac number, because 12504891 - 2¹ = 12504889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12504841) 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 15 ways as a sum of consecutive naturals, for example, 8946 + ... + 10248.

It is an arithmetic number, because the mean of its divisors is an integer number (1194464).

Almost surely, 2^12504891 is an apocalyptic number.

12504891 is a deficient number, since it is larger than the sum of its proper divisors (6606533).

12504891 is a wasteful number, since it uses less digits than its factorization.

12504891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1770.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 12504891 is about 3536.2255301380. The cubic root of 12504891 is about 232.1097070815.

The spelling of 12504891 in words is "twelve million, five hundred four thousand, eight hundred ninety-one".