25422425 has 18 divisors (see below), whose sum is σ = 36672318. Its totient is φ = 17431680.

The previous prime is 25422379. The next prime is 25422427. The reversal of 25422425 is 52422452.

It can be written as a sum of positive squares in 3 ways, for example, as 582169 + 24840256 = 763^2 + 4984^2 .

It is not a de Polignac number, because 25422425 - 2¹⁸ = 25160281 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25422394 and 25422403.

It is not an unprimeable number, because it can be changed into a prime (25422427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 9152 + ... + 11601.

It is an arithmetic number, because the mean of its divisors is an integer number (2037351).

It is a self-describing number.

Almost surely, 2^25422425 is an apocalyptic number.

25422425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25422425 is a deficient number, since it is larger than the sum of its proper divisors (11249893).

25422425 is a wasteful number, since it uses less digits than its factorization.

25422425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20777 (or 20765 counting only the distinct ones).

The product of its digits is 6400, while the sum is 26.

The square root of 25422425 is about 5042.0655489591. The cubic root of 25422425 is about 294.0394882711.

Adding to 25422425 its reverse (52422452), we get a palindrome (77844877).

The spelling of 25422425 in words is "twenty-five million, four hundred twenty-two thousand, four hundred twenty-five".