2542139 has 2 divisors, whose sum is σ = 2542140. Its totient is φ = 2542138.

The previous prime is 2542109. The next prime is 2542147. The reversal of 2542139 is 9312452.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2542139 - 2⁸ = 2541883 is a prime.

It is not a weakly prime, because it can be changed into another prime (2542109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1271069 + 1271070.

It is an arithmetic number, because the mean of its divisors is an integer number (1271070).

2^2542139 is an apocalyptic number.

2542139 is a deficient number, since it is larger than the sum of its proper divisors (1).

2542139 is an equidigital number, since it uses as much as digits as its factorization.

2542139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 26.

The square root of 2542139 is about 1594.4086678139. The cubic root of 2542139 is about 136.4791883722.

The spelling of 2542139 in words is "two million, five hundred forty-two thousand, one hundred thirty-nine".