25420406 has 48 divisors (see below), whose sum is σ = 45849888. Its totient is φ = 10517760.

The previous prime is 25420399. The next prime is 25420411. The reversal of 25420406 is 60402452.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 152135 + ... + 152301.

It is an arithmetic number, because the mean of its divisors is an integer number (955206).

Almost surely, 2^25420406 is an apocalyptic number.

25420406 is a deficient number, since it is larger than the sum of its proper divisors (20429482).

25420406 is a wasteful number, since it uses less digits than its factorization.

25420406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245 (or 234 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 25420406 is about 5041.8653294193. The cubic root of 25420406 is about 294.0317040486.

Adding to 25420406 its reverse (60402452), we get a palindrome (85822858).

The spelling of 25420406 in words is "twenty-five million, four hundred twenty thousand, four hundred six".