2542609 has 2 divisors, whose sum is σ = 2542610. Its totient is φ = 2542608.

The previous prime is 2542607. The next prime is 2542619. The reversal of 2542609 is 9062452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1782225 + 760384 = 1335^2 + 872^2 .

It is a cyclic number.

It is not a de Polignac number, because 2542609 - 2¹ = 2542607 is a prime.

Together with 2542607, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2542607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1271304 + 1271305.

It is an arithmetic number, because the mean of its divisors is an integer number (1271305).

2^2542609 is an apocalyptic number.

It is an amenable number.

2542609 is a deficient number, since it is larger than the sum of its proper divisors (1).

2542609 is an equidigital number, since it uses as much as digits as its factorization.

2542609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 2542609 is about 1594.5560510688. The cubic root of 2542609 is about 136.4875987785.

The spelling of 2542609 in words is "two million, five hundred forty-two thousand, six hundred nine".