2542739 has 2 divisors, whose sum is σ = 2542740. Its totient is φ = 2542738.

The previous prime is 2542733. The next prime is 2542759. The reversal of 2542739 is 9372452.

It is a happy number.

2542739 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2542739 - 2⁸ = 2542483 is a prime.

It is equal to p₁₈₅₉₇₂ and since 2542739 and 185972 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (2542733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1271369 + 1271370.

It is an arithmetic number, because the mean of its divisors is an integer number (1271370).

2^2542739 is an apocalyptic number.

2542739 is a deficient number, since it is larger than the sum of its proper divisors (1).

2542739 is an equidigital number, since it uses as much as digits as its factorization.

2542739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 32.

The square root of 2542739 is about 1594.5968142449. The cubic root of 2542739 is about 136.4899248782.

The spelling of 2542739 in words is "two million, five hundred forty-two thousand, seven hundred thirty-nine".