25040423 has 4 divisors (see below), whose sum is σ = 26358360. Its totient is φ = 23722488.

The previous prime is 25040419. The next prime is 25040443. The reversal of 25040423 is 32404052.

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

It is not a de Polignac number, because 25040423 - 2² = 25040419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25040395 and 25040404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25040413) 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, 658940 + ... + 658977.

It is an arithmetic number, because the mean of its divisors is an integer number (6589590).

Almost surely, 2^25040423 is an apocalyptic number.

25040423 is a deficient number, since it is larger than the sum of its proper divisors (1317937).

25040423 is a wasteful number, since it uses less digits than its factorization.

25040423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317936.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 25040423 is about 5004.0406673008. The cubic root of 25040423 is about 292.5592857158.

Adding to 25040423 its reverse (32404052), we get a palindrome (57444475).

The spelling of 25040423 in words is "twenty-five million, forty thousand, four hundred twenty-three".