3172865 has 4 divisors (see below), whose sum is σ = 3807444. Its totient is φ = 2538288.

The previous prime is 3172847. The next prime is 3172879. The reversal of 3172865 is 5682713.

It is a happy number.

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 638401 + 2534464 = 799^2 + 1592^2 .

It is a cyclic number.

It is not a de Polignac number, because 3172865 - 2⁶ = 3172801 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 317282 + ... + 317291.

It is an arithmetic number, because the mean of its divisors is an integer number (951861).

Almost surely, 2^3172865 is an apocalyptic number.

It is an amenable number.

3172865 is a deficient number, since it is larger than the sum of its proper divisors (634579).

3172865 is an equidigital number, since it uses as much as digits as its factorization.

3172865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634578.

The product of its digits is 10080, while the sum is 32.

The square root of 3172865 is about 1781.2537719258. The cubic root of 3172865 is about 146.9435512202.

The spelling of 3172865 in words is "three million, one hundred seventy-two thousand, eight hundred sixty-five".