2538391 has 4 divisors (see below), whose sum is σ = 2541592. Its totient is φ = 2535192.

The previous prime is 2538377. The next prime is 2538397. The reversal of 2538391 is 1938352.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2538391 - 2⁵ = 2538359 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 (2538397) 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, 580 + ... + 2326.

It is an arithmetic number, because the mean of its divisors is an integer number (635398).

2^2538391 is an apocalyptic number.

2538391 is a deficient number, since it is larger than the sum of its proper divisors (3201).

2538391 is a wasteful number, since it uses less digits than its factorization.

2538391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3200.

The product of its digits is 6480, while the sum is 31.

The square root of 2538391 is about 1593.2328768890. The cubic root of 2538391 is about 136.4120827324.

It can be divided in two parts, 25 and 38391, that added together give a 4-th power (38416 = 14⁴).

The spelling of 2538391 in words is "two million, five hundred thirty-eight thousand, three hundred ninety-one".