25430939 has 4 divisors (see below), whose sum is σ = 26536656. Its totient is φ = 24325224.

The previous prime is 25430917. The next prime is 25430953. The reversal of 25430939 is 93903452.

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 25430939 - 2²⁰ = 24382363 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25430899 and 25430908.

It is not an unprimeable number, because it can be changed into a prime (25430039) 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 in 3 ways as a sum of consecutive naturals, for example, 552824 + ... + 552869.

It is an arithmetic number, because the mean of its divisors is an integer number (6634164).

Almost surely, 2^25430939 is an apocalyptic number.

25430939 is a deficient number, since it is larger than the sum of its proper divisors (1105717).

25430939 is a wasteful number, since it uses less digits than its factorization.

25430939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105716.

The product of its (nonzero) digits is 29160, while the sum is 35.

The square root of 25430939 is about 5042.9097751199. The cubic root of 25430939 is about 294.0723093308.

The spelling of 25430939 in words is "twenty-five million, four hundred thirty thousand, nine hundred thirty-nine".