25103421 has 12 divisors (see below), whose sum is σ = 41440672. Its totient is φ = 14344776.

The previous prime is 25103417. The next prime is 25103431. The reversal of 25103421 is 12430152.

It is not a de Polignac number, because 25103421 - 2² = 25103417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25103394 and 25103403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25103411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 199171 + ... + 199296.

Almost surely, 2^25103421 is an apocalyptic number.

25103421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25103421 is a deficient number, since it is larger than the sum of its proper divisors (16337251).

25103421 is a wasteful number, since it uses less digits than its factorization.

25103421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398480 (or 398477 counting only the distinct ones).

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

The square root of 25103421 is about 5010.3314261633. The cubic root of 25103421 is about 292.8044255467.

Adding to 25103421 its reverse (12430152), we get a palindrome (37533573).

The spelling of 25103421 in words is "twenty-five million, one hundred three thousand, four hundred twenty-one".