2172069 has 8 divisors (see below), whose sum is σ = 3217920. Its totient is φ = 1448028.

The previous prime is 2172067. The next prime is 2172083. The reversal of 2172069 is 9602712.

It is not a de Polignac number, because 2172069 - 2¹ = 2172067 is a prime.

It is a super-2 number, since 2×2172069² = 9435767481522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 80447 = 2172069 / (2 + 1 + 7 + 2 + 0 + 6 + 9).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40197 + ... + 40250.

It is an arithmetic number, because the mean of its divisors is an integer number (402240).

2^2172069 is an apocalyptic number.

It is an amenable number.

2172069 is a deficient number, since it is larger than the sum of its proper divisors (1045851).

2172069 is an equidigital number, since it uses as much as digits as its factorization.

2172069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80456 (or 80450 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 2172069 is about 1473.7940833101. The cubic root of 2172069 is about 129.5063924534.

The spelling of 2172069 in words is "two million, one hundred seventy-two thousand, sixty-nine".