2172556 has 6 divisors (see below), whose sum is σ = 3801980. Its totient is φ = 1086276.

The previous prime is 2172551. The next prime is 2172559. The reversal of 2172556 is 6552712.

It is not an unprimeable number, because it can be changed into a prime (2172551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271566 + ... + 271573.

2^2172556 is an apocalyptic number.

It is an amenable number.

2172556 is a deficient number, since it is larger than the sum of its proper divisors (1629424).

2172556 is a wasteful number, since it uses less digits than its factorization.

2172556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543143 (or 543141 counting only the distinct ones).

The product of its digits is 4200, while the sum is 28.

The square root of 2172556 is about 1473.9592938748. The cubic root of 2172556 is about 129.5160706143.

The spelling of 2172556 in words is "two million, one hundred seventy-two thousand, five hundred fifty-six".