12745890 has 32 divisors (see below), whose sum is σ = 33989760. Its totient is φ = 3398832.

The previous prime is 12745853. The next prime is 12745891. The reversal of 12745890 is 9854721.

12745890 is a `hidden beast` number, since 1 + 2 + 74 + 589 + 0 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (12745891) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 23334 + ... + 23873.

It is an arithmetic number, because the mean of its divisors is an integer number (1062180).

Almost surely, 2^12745890 is an apocalyptic number.

12745890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12745890 is an abundant number, since it is smaller than the sum of its proper divisors (21243870).

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

12745890 is a wasteful number, since it uses less digits than its factorization.

12745890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47223 (or 47217 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 12745890 is about 3570.1386527697. The cubic root of 12745890 is about 233.5913314049.

The spelling of 12745890 in words is "twelve million, seven hundred forty-five thousand, eight hundred ninety".