2172669 has 16 divisors (see below), whose sum is σ = 3118080. Its totient is φ = 1341360.

The previous prime is 2172659. The next prime is 2172673. The reversal of 2172669 is 9662712.

It is a de Polignac number, because none of the positive numbers 2^k-2172669 is a prime.

It is a super-2 number, since 2×2172669² = 9440981167122, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2274 + ... + 3084.

It is an arithmetic number, because the mean of its divisors is an integer number (194880).

2^2172669 is an apocalyptic number.

It is an amenable number.

2172669 is a deficient number, since it is larger than the sum of its proper divisors (945411).

2172669 is a wasteful number, since it uses less digits than its factorization.

2172669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880.

The product of its digits is 9072, while the sum is 33.

The square root of 2172669 is about 1473.9976255069. The cubic root of 2172669 is about 129.5183160589.

The spelling of 2172669 in words is "two million, one hundred seventy-two thousand, six hundred sixty-nine".