12155280 has 40 divisors (see below), whose sum is σ = 37682112. Its totient is φ = 3241344.

The previous prime is 12155279. The next prime is 12155291. The reversal of 12155280 is 8255121.

12155280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 12155280.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25084 + ... + 25563.

Almost surely, 2^12155280 is an apocalyptic number.

12155280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12155280 is an abundant number, since it is smaller than the sum of its proper divisors (25526832).

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

12155280 is a wasteful number, since it uses less digits than its factorization.

12155280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50663 (or 50657 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 12155280 is about 3486.4423127308. The cubic root of 12155280 is about 229.9261262435.

The spelling of 12155280 in words is "twelve million, one hundred fifty-five thousand, two hundred eighty".