3172129 has 4 divisors (see below), whose sum is σ = 3249540. Its totient is φ = 3094720.

The previous prime is 3172123. The next prime is 3172133. The reversal of 3172129 is 9212713.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 74529 + 3097600 = 273^2 + 1760^2 .

It is a cyclic number.

It is not a de Polignac number, because 3172129 - 2⁵ = 3172097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3172123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38644 + ... + 38725.

It is an arithmetic number, because the mean of its divisors is an integer number (812385).

Almost surely, 2^3172129 is an apocalyptic number.

It is an amenable number.

3172129 is a deficient number, since it is larger than the sum of its proper divisors (77411).

3172129 is an equidigital number, since it uses as much as digits as its factorization.

3172129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77410.

The product of its digits is 756, while the sum is 25.

The square root of 3172129 is about 1781.0471638898. The cubic root of 3172129 is about 146.9321883229.

The spelling of 3172129 in words is "three million, one hundred seventy-two thousand, one hundred twenty-nine".