2542431 has 4 divisors (see below), whose sum is σ = 3389912. Its totient is φ = 1694952.

The previous prime is 2542429. The next prime is 2542453. The reversal of 2542431 is 1342452.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2542431 - 2¹ = 2542429 is a prime.

It is a super-2 number, since 2×2542431² = 12927910779522, which contains 22 as substring.

It is a D-number.

It is the 1595-th Hogben number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2542398 and 2542407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2542471) by changing a digit.

It is a nontrivial repunit in base 1594.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 423736 + ... + 423741.

It is an arithmetic number, because the mean of its divisors is an integer number (847478).

2^2542431 is an apocalyptic number.

2542431 is a deficient number, since it is larger than the sum of its proper divisors (847481).

2542431 is an equidigital number, since it uses as much as digits as its factorization.

2542431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847480.

The product of its digits is 960, while the sum is 21.

The square root of 2542431 is about 1594.5002351834. The cubic root of 2542431 is about 136.4844136828.

Adding to 2542431 its sum of digits (21), we get a palindrome (2542452).

Adding to 2542431 its reverse (1342452), we get a palindrome (3884883).

The spelling of 2542431 in words is "two million, five hundred forty-two thousand, four hundred thirty-one".