25232421 has 8 divisors (see below), whose sum is σ = 33673984. Its totient is φ = 16806240.

The previous prime is 25232413. The next prime is 25232429. The reversal of 25232421 is 12423252.

It is an interprime number because it is at equal distance from previous prime (25232413) and next prime (25232429).

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

It is not a de Polignac number, because 25232421 - 2³ = 25232413 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 (25232429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 780 + ... + 7146.

It is an arithmetic number, because the mean of its divisors is an integer number (4209248).

Almost surely, 2^25232421 is an apocalyptic number.

It is an amenable number.

25232421 is a deficient number, since it is larger than the sum of its proper divisors (8441563).

25232421 is a wasteful number, since it uses less digits than its factorization.

25232421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7691.

The product of its digits is 960, while the sum is 21.

The square root of 25232421 is about 5023.1883301346. The cubic root of 25232421 is about 293.3051176660.

Adding to 25232421 its reverse (12423252), we get a palindrome (37655673).

The spelling of 25232421 in words is "twenty-five million, two hundred thirty-two thousand, four hundred twenty-one".