25742623 has 2 divisors, whose sum is σ = 25742624. Its totient is φ = 25742622.

The previous prime is 25742621. The next prime is 25742653. The reversal of 25742623 is 32624752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25742623 - 2¹ = 25742621 is a prime.

Together with 25742621, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25742621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12871311 + 12871312.

It is an arithmetic number, because the mean of its divisors is an integer number (12871312).

Almost surely, 2^25742623 is an apocalyptic number.

25742623 is a deficient number, since it is larger than the sum of its proper divisors (1).

25742623 is an equidigital number, since it uses as much as digits as its factorization.

25742623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 31.

The square root of 25742623 is about 5073.7188530702. The cubic root of 25742623 is about 295.2688270551.

The spelling of 25742623 in words is "twenty-five million, seven hundred forty-two thousand, six hundred twenty-three".