25425021 has 8 divisors (see below), whose sum is σ = 35684320. Its totient is φ = 16057872.

The previous prime is 25425011. The next prime is 25425041. The reversal of 25425021 is 12052452.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25425021 - 2⁵ = 25424989 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 (25425011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222970 + ... + 223083.

It is an arithmetic number, because the mean of its divisors is an integer number (4460540).

Almost surely, 2^25425021 is an apocalyptic number.

It is an amenable number.

25425021 is a deficient number, since it is larger than the sum of its proper divisors (10259299).

25425021 is a wasteful number, since it uses less digits than its factorization.

25425021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446075.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 25425021 is about 5042.3229765655. The cubic root of 25425021 is about 294.0494965025.

Adding to 25425021 its reverse (12052452), we get a palindrome (37477473).

The spelling of 25425021 in words is "twenty-five million, four hundred twenty-five thousand, twenty-one".