2539965 has 16 divisors (see below), whose sum is σ = 4204800. Its totient is φ = 1307712.

The previous prime is 2539963. The next prime is 2539981. The reversal of 2539965 is 5699352.

It is not a de Polignac number, because 2539965 - 2¹ = 2539963 is a prime.

It is a d-powerful number, because it can be written as 2¹⁹ + 5⁵ + 3¹⁰ + 9² + 9² + 6³ + 5⁹ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2539961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2485 + ... + 3354.

It is an arithmetic number, because the mean of its divisors is an integer number (262800).

2^2539965 is an apocalyptic number.

It is an amenable number.

2539965 is a deficient number, since it is larger than the sum of its proper divisors (1664835).

2539965 is a wasteful number, since it uses less digits than its factorization.

2539965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5876.

The product of its digits is 72900, while the sum is 39.

The square root of 2539965 is about 1593.7267645365. The cubic root of 2539965 is about 136.4402722763.

The spelling of 2539965 in words is "two million, five hundred thirty-nine thousand, nine hundred sixty-five".