2172537 has 6 divisors (see below), whose sum is σ = 3138122. Its totient is φ = 1448352.

The previous prime is 2172497. The next prime is 2172539. The reversal of 2172537 is 7352712.

It can be written as a sum of positive squares in only one way, i.e., 2143296 + 29241 = 1464^2 + 171^2 .

It is not a de Polignac number, because 2172537 - 2⁶ = 2172473 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2172537.

It is not an unprimeable number, because it can be changed into a prime (2172539) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 120688 + ... + 120705.

2^2172537 is an apocalyptic number.

It is an amenable number.

2172537 is a deficient number, since it is larger than the sum of its proper divisors (965585).

2172537 is a wasteful number, since it uses less digits than its factorization.

2172537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241399 (or 241396 counting only the distinct ones).

The product of its digits is 2940, while the sum is 27.

The square root of 2172537 is about 1473.9528486353. The cubic root of 2172537 is about 129.5156930541.

The spelling of 2172537 in words is "two million, one hundred seventy-two thousand, five hundred thirty-seven".