25494391 has 4 divisors (see below), whose sum is σ = 27455512. Its totient is φ = 23533272.

The previous prime is 25494383. The next prime is 25494397. The reversal of 25494391 is 19349452.

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 25494391 - 2³ = 25494383 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25494391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25494397) 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, 980541 + ... + 980566.

It is an arithmetic number, because the mean of its divisors is an integer number (6863878).

Almost surely, 2^25494391 is an apocalyptic number.

25494391 is a deficient number, since it is larger than the sum of its proper divisors (1961121).

25494391 is a wasteful number, since it uses less digits than its factorization.

25494391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1961120.

The product of its digits is 38880, while the sum is 37.

The square root of 25494391 is about 5049.1970648807. The cubic root of 25494391 is about 294.3166833030.

The spelling of 25494391 in words is "twenty-five million, four hundred ninety-four thousand, three hundred ninety-one".