12256890 has 16 divisors (see below), whose sum is σ = 29416608. Its totient is φ = 3268496.

The previous prime is 12256883. The next prime is 12256903. The reversal of 12256890 is 9865221.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 204252 + ... + 204311.

It is an arithmetic number, because the mean of its divisors is an integer number (1838538).

Almost surely, 2^12256890 is an apocalyptic number.

12256890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12256890 is an abundant number, since it is smaller than the sum of its proper divisors (17159718).

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

12256890 is a wasteful number, since it uses less digits than its factorization.

12256890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408573.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 12256890 is about 3500.9841473506. The cubic root of 12256890 is about 230.5650254224.

The spelling of 12256890 in words is "twelve million, two hundred fifty-six thousand, eight hundred ninety".