12172280 has 32 divisors (see below), whose sum is σ = 27561600. Its totient is φ = 4838016.

The previous prime is 12172273. The next prime is 12172283. The reversal of 12172280 is 8227121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12172283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6041 + ... + 7799.

It is an arithmetic number, because the mean of its divisors is an integer number (861300).

Almost surely, 2^12172280 is an apocalyptic number.

12172280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12172280 is an abundant number, since it is smaller than the sum of its proper divisors (15389320).

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

12172280 is a wasteful number, since it uses less digits than its factorization.

12172280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1943 (or 1939 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 12172280 is about 3488.8794762789. The cubic root of 12172280 is about 230.0332655099.

The spelling of 12172280 in words is "twelve million, one hundred seventy-two thousand, two hundred eighty".