2657539 has 4 divisors (see below), whose sum is σ = 2674624. Its totient is φ = 2640456.

The previous prime is 2657533. The next prime is 2657561. The reversal of 2657539 is 9357562.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9357562 = 2 ⋅4678781.

It is a cyclic number.

It is not a de Polignac number, because 2657539 - 2⁹ = 2657027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2657498 and 2657507.

It is not an unprimeable number, because it can be changed into a prime (2657533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8307 + ... + 8620.

It is an arithmetic number, because the mean of its divisors is an integer number (668656).

2^2657539 is an apocalyptic number.

2657539 is a deficient number, since it is larger than the sum of its proper divisors (17085).

2657539 is a wasteful number, since it uses less digits than its factorization.

2657539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17084.

The product of its digits is 56700, while the sum is 37.

The square root of 2657539 is about 1630.1960004858. The cubic root of 2657539 is about 138.5138547397.

The spelling of 2657539 in words is "two million, six hundred fifty-seven thousand, five hundred thirty-nine".