2172625 has 32 divisors (see below), whose sum is σ = 3354624. Its totient is φ = 1368000.

The previous prime is 2172619. The next prime is 2172641. The reversal of 2172625 is 5262712.

It is not a de Polignac number, because 2172625 - 2⁷ = 2172497 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

2172625 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2172625.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11280 + ... + 11470.

It is an arithmetic number, because the mean of its divisors is an integer number (104832).

2^2172625 is an apocalyptic number.

2172625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2172625 is a deficient number, since it is larger than the sum of its proper divisors (1181999).

2172625 is a wasteful number, since it uses less digits than its factorization.

2172625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226 (or 216 counting only the distinct ones).

The product of its digits is 1680, while the sum is 25.

The square root of 2172625 is about 1473.9827000342. The cubic root of 2172625 is about 129.5174417358.

The spelling of 2172625 in words is "two million, one hundred seventy-two thousand, six hundred twenty-five".