25442903 has 4 divisors (see below), whose sum is σ = 25749528. Its totient is φ = 25136280.

The previous prime is 25442891. The next prime is 25442927. The reversal of 25442903 is 30924452.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25442903 - 2⁴ = 25442887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25442953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153188 + ... + 153353.

It is an arithmetic number, because the mean of its divisors is an integer number (6437382).

Almost surely, 2^25442903 is an apocalyptic number.

25442903 is a deficient number, since it is larger than the sum of its proper divisors (306625).

25442903 is an equidigital number, since it uses as much as digits as its factorization.

25442903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306624.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 25442903 is about 5044.0958555523. The cubic root of 25442903 is about 294.1184175972.

The spelling of 25442903 in words is "twenty-five million, four hundred forty-two thousand, nine hundred three".