25504421 has 8 divisors (see below), whose sum is σ = 26033664. Its totient is φ = 24979680.

The previous prime is 25504411. The next prime is 25504459. The reversal of 25504421 is 12440552.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 25504421 - 2⁶ = 25504357 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 (25504411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11801 + ... + 13793.

It is an arithmetic number, because the mean of its divisors is an integer number (3254208).

Almost surely, 2^25504421 is an apocalyptic number.

It is an amenable number.

25504421 is a deficient number, since it is larger than the sum of its proper divisors (529243).

25504421 is a wasteful number, since it uses less digits than its factorization.

25504421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2251.

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

The square root of 25504421 is about 5050.1901944382. The cubic root of 25504421 is about 294.3552749197.

Adding to 25504421 its reverse (12440552), we get a palindrome (37944973).

The spelling of 25504421 in words is "twenty-five million, five hundred four thousand, four hundred twenty-one".