2172756 has 12 divisors (see below), whose sum is σ = 5069792. Its totient is φ = 724248.

The previous prime is 2172733. The next prime is 2172761. The reversal of 2172756 is 6572712.

It is a tau number, because it is divible by the number of its divisors (12).

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, 90520 + ... + 90543.

2^2172756 is an apocalyptic number.

It is an amenable number.

2172756 is an abundant number, since it is smaller than the sum of its proper divisors (2897036).

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

2172756 is a wasteful number, since it uses less digits than its factorization.

2172756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181070 (or 181068 counting only the distinct ones).

The product of its digits is 5880, while the sum is 30.

The square root of 2172756 is about 1474.0271367923. The cubic root of 2172756 is about 129.5200447995.

The spelling of 2172756 in words is "two million, one hundred seventy-two thousand, seven hundred fifty-six".