25421245 has 4 divisors (see below), whose sum is σ = 30505500. Its totient is φ = 20336992.

The previous prime is 25421237. The next prime is 25421251. The reversal of 25421245 is 54212452.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7806436 + 17614809 = 2794^2 + 4197^2 .

It is a cyclic number.

It is not a de Polignac number, because 25421245 - 2³ = 25421237 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2542120 + ... + 2542129.

It is an arithmetic number, because the mean of its divisors is an integer number (7626375).

Almost surely, 2^25421245 is an apocalyptic number.

It is an amenable number.

25421245 is a deficient number, since it is larger than the sum of its proper divisors (5084255).

25421245 is an equidigital number, since it uses as much as digits as its factorization.

25421245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5084254.

The product of its digits is 3200, while the sum is 25.

The square root of 25421245 is about 5041.9485320658. The cubic root of 25421245 is about 294.0349388499.

Adding to 25421245 its reverse (54212452), we get a palindrome (79633697).

The spelling of 25421245 in words is "twenty-five million, four hundred twenty-one thousand, two hundred forty-five".