2172824 has 8 divisors (see below), whose sum is σ = 4074060. Its totient is φ = 1086408.

The previous prime is 2172823. The next prime is 2172827. The reversal of 2172824 is 4282712.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 2172793 and 2172802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 135794 + ... + 135809.

2^2172824 is an apocalyptic number.

It is an amenable number.

2172824 is a deficient number, since it is larger than the sum of its proper divisors (1901236).

2172824 is a wasteful number, since it uses less digits than its factorization.

2172824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271609 (or 271605 counting only the distinct ones).

The product of its digits is 1792, while the sum is 26.

The square root of 2172824 is about 1474.0502026729. The cubic root of 2172824 is about 129.5213959669.

The spelling of 2172824 in words is "two million, one hundred seventy-two thousand, eight hundred twenty-four".