25205423 has 4 divisors (see below), whose sum is σ = 25488720. Its totient is φ = 24922128.

The previous prime is 25205417. The next prime is 25205429. The reversal of 25205423 is 32450252.

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

It is an interprime number because it is at equal distance from previous prime (25205417) and next prime (25205429).

It is a cyclic number.

It is not a de Polignac number, because 25205423 - 2¹⁶ = 25139887 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 (25205429) 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, 141515 + ... + 141692.

It is an arithmetic number, because the mean of its divisors is an integer number (6372180).

Almost surely, 2^25205423 is an apocalyptic number.

25205423 is a deficient number, since it is larger than the sum of its proper divisors (283297).

25205423 is an equidigital number, since it uses as much as digits as its factorization.

25205423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283296.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 25205423 is about 5020.5002738771. The cubic root of 25205423 is about 293.2004708507.

Adding to 25205423 its reverse (32450252), we get a palindrome (57655675).

The spelling of 25205423 in words is "twenty-five million, two hundred five thousand, four hundred twenty-three".