25310421 has 16 divisors (see below), whose sum is σ = 37713600. Its totient is φ = 16776144.

The previous prime is 25310377. The next prime is 25310423. The reversal of 25310421 is 12401352.

It is not a de Polignac number, because 25310421 - 2¹⁰ = 25309397 is a prime.

It is a super-2 number, since 2×25310421² = 1281234822394482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25310394 and 25310403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25310423) 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 15 ways as a sum of consecutive naturals, for example, 2215 + ... + 7451.

It is an arithmetic number, because the mean of its divisors is an integer number (2357100).

Almost surely, 2^25310421 is an apocalyptic number.

It is an amenable number.

25310421 is a deficient number, since it is larger than the sum of its proper divisors (12403179).

25310421 is a wasteful number, since it uses less digits than its factorization.

25310421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5425 (or 5419 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 25310421 is about 5030.9463324508. The cubic root of 25310421 is about 293.6070343394.

Adding to 25310421 its reverse (12401352), we get a palindrome (37711773).

The spelling of 25310421 in words is "twenty-five million, three hundred ten thousand, four hundred twenty-one".