2539917 has 10 divisors (see below), whose sum is σ = 3794318. Its totient is φ = 1693224.

The previous prime is 2539871. The next prime is 2539951. The reversal of 2539917 is 7199352.

It can be written as a sum of positive squares in only one way, i.e., 2368521 + 171396 = 1539^2 + 414^2 .

It is not a de Polignac number, because 2539917 - 2⁸ = 2539661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2539997) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 15598 + ... + 15759.

2^2539917 is an apocalyptic number.

2539917 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2539917 is a deficient number, since it is larger than the sum of its proper divisors (1254401).

2539917 is an equidigital number, since it uses as much as digits as its factorization.

2539917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31369 (or 31360 counting only the distinct ones).

The product of its digits is 17010, while the sum is 36.

The square root of 2539917 is about 1593.7117054223. The cubic root of 2539917 is about 136.4394127928.

The spelling of 2539917 in words is "two million, five hundred thirty-nine thousand, nine hundred seventeen".