12544890 has 32 divisors (see below), whose sum is σ = 31418496. Its totient is φ = 3199680.

The previous prime is 12544877. The next prime is 12544901. The reversal of 12544890 is 9844521.

It is a super-2 number, since 2×12544890² = 314748530224200, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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, 8401 + ... + 9780.

It is an arithmetic number, because the mean of its divisors is an integer number (981828).

Almost surely, 2^12544890 is an apocalyptic number.

12544890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12544890 is an abundant number, since it is smaller than the sum of its proper divisors (18873606).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12544890 is a wasteful number, since it uses less digits than its factorization.

12544890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18214.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 12544890 is about 3541.8766212278. The cubic root of 12544890 is about 232.3569243437.

The spelling of 12544890 in words is "twelve million, five hundred forty-four thousand, eight hundred ninety".