2166504 has 16 divisors (see below), whose sum is σ = 5416320. Its totient is φ = 722160.

The previous prime is 2166467. The next prime is 2166509. The reversal of 2166504 is 4056612.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 90271 = 2166504 / (2 + 1 + 6 + 6 + 5 + 0 + 4).

It is not an unprimeable number, because it can be changed into a prime (2166509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45112 + ... + 45159.

It is an arithmetic number, because the mean of its divisors is an integer number (338520).

2^2166504 is an apocalyptic number.

2166504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2166504 is an abundant number, since it is smaller than the sum of its proper divisors (3249816).

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

2166504 is a wasteful number, since it uses less digits than its factorization.

2166504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90280 (or 90276 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 2166504 is about 1471.9048882316. The cubic root of 2166504 is about 129.3956962386.

The spelling of 2166504 in words is "two million, one hundred sixty-six thousand, five hundred four".