2542531 has 2 divisors, whose sum is σ = 2542532. Its totient is φ = 2542530.

The previous prime is 2542513. The next prime is 2542549. The reversal of 2542531 is 1352452.

Together with previous prime (2542513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (2542513) and next prime (2542549).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2542531 is a prime.

It is a super-2 number, since 2×2542531² = 12928927771922, which contains 22 as substring.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (2542511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1271265 + 1271266.

It is an arithmetic number, because the mean of its divisors is an integer number (1271266).

2^2542531 is an apocalyptic number.

2542531 is a deficient number, since it is larger than the sum of its proper divisors (1).

2542531 is an equidigital number, since it uses as much as digits as its factorization.

2542531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1200, while the sum is 22.

The square root of 2542531 is about 1594.5315926629. The cubic root of 2542531 is about 136.4862030807.

Adding to 2542531 its reverse (1352452), we get a palindrome (3894983).

The spelling of 2542531 in words is "two million, five hundred forty-two thousand, five hundred thirty-one".