2172624 has 20 divisors (see below), whose sum is σ = 5612736. Its totient is φ = 724192.

The previous prime is 2172619. The next prime is 2172641. The reversal of 2172624 is 4262712.

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

It is a junction number, because it is equal to n+sod(n) for n = 2172594 and 2172603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22584 + ... + 22679.

2^2172624 is an apocalyptic number.

2172624 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2172624 is an abundant number, since it is smaller than the sum of its proper divisors (3440112).

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

2172624 is a wasteful number, since it uses less digits than its factorization.

2172624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45274 (or 45268 counting only the distinct ones).

The product of its digits is 1344, while the sum is 24.

The square root of 2172624 is about 1473.9823608171. The cubic root of 2172624 is about 129.5174218646.

The spelling of 2172624 in words is "two million, one hundred seventy-two thousand, six hundred twenty-four".