2539745 has 16 divisors (see below), whose sum is σ = 3365712. Its totient is φ = 1827840.

The previous prime is 2539699. The next prime is 2539753. The reversal of 2539745 is 5479352.

It can be written as a sum of positive squares in 8 ways, for example, as 786769 + 1752976 = 887^2 + 1324^2 .

It is not a de Polignac number, because 2539745 - 2¹⁶ = 2474209 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2189 + ... + 3141.

It is an arithmetic number, because the mean of its divisors is an integer number (210357).

2^2539745 is an apocalyptic number.

It is an amenable number.

2539745 is a deficient number, since it is larger than the sum of its proper divisors (825967).

2539745 is a wasteful number, since it uses less digits than its factorization.

2539745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012.

The product of its digits is 37800, while the sum is 35.

The square root of 2539745 is about 1593.6577424278. The cubic root of 2539745 is about 136.4363328879.

The spelling of 2539745 in words is "two million, five hundred thirty-nine thousand, seven hundred forty-five".