25421045 has 16 divisors (see below), whose sum is σ = 33152112. Its totient is φ = 18600960.

The previous prime is 25421027. The next prime is 25421059. The reversal of 25421045 is 54012452.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 11930116 + 13490929 = 3454^2 + 3673^2 .

It is not a de Polignac number, because 25421045 - 2⁸ = 25420789 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 25421045.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5615 + ... + 9075.

It is an arithmetic number, because the mean of its divisors is an integer number (2072007).

Almost surely, 2^25421045 is an apocalyptic number.

It is an amenable number.

25421045 is a deficient number, since it is larger than the sum of its proper divisors (7731067).

25421045 is a wasteful number, since it uses less digits than its factorization.

25421045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3592.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 25421045 is about 5041.9286984248. The cubic root of 25421045 is about 294.0341677476.

Adding to 25421045 its reverse (54012452), we get a palindrome (79433497).

The spelling of 25421045 in words is "twenty-five million, four hundred twenty-one thousand, forty-five".