12149856 has 36 divisors (see below), whose sum is σ = 34551972. Its totient is φ = 4049856.

The previous prime is 12149843. The next prime is 12149867. The reversal of 12149856 is 65894121.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

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

It is a self number, because there is not a number n which added to its sum of digits gives 12149856.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20806 + ... + 21381.

It is an arithmetic number, because the mean of its divisors is an integer number (959777).

Almost surely, 2^12149856 is an apocalyptic number.

12149856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12149856 is an abundant number, since it is smaller than the sum of its proper divisors (22402116).

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

12149856 is a wasteful number, since it uses less digits than its factorization.

12149856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42203 (or 42192 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 12149856 is about 3485.6643556143. The cubic root of 12149856 is about 229.8919214959.

The spelling of 12149856 in words is "twelve million, one hundred forty-nine thousand, eight hundred fifty-six".