2152717 has 6 divisors (see below), whose sum is σ = 2504238. Its totient is φ = 1845144.

The previous prime is 2152691. The next prime is 2152729. The reversal of 2152717 is 7172512.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1285956 + 866761 = 1134^2 + 931^2 .

It is not a de Polignac number, because 2152717 - 2⁷ = 2152589 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2152691 and 2152700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2152517) 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, 21918 + ... + 22015.

It is an arithmetic number, because the mean of its divisors is an integer number (417373).

2^2152717 is an apocalyptic number.

It is an amenable number.

2152717 is a deficient number, since it is larger than the sum of its proper divisors (351521).

2152717 is an equidigital number, since it uses as much as digits as its factorization.

2152717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43947 (or 43940 counting only the distinct ones).

The product of its digits is 980, while the sum is 25.

The square root of 2152717 is about 1467.2140266505. The cubic root of 2152717 is about 129.1206331047.

The spelling of 2152717 in words is "two million, one hundred fifty-two thousand, seven hundred seventeen".