25421416 has 16 divisors (see below), whose sum is σ = 48104100. Its totient is φ = 12593664.

The previous prime is 25421413. The next prime is 25421423. The reversal of 25421416 is 61412452.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 24108100 + 1313316 = 4910^2 + 1146^2 .

It is not an unprimeable number, because it can be changed into a prime (25421413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13705 + ... + 15448.

Almost surely, 2^25421416 is an apocalyptic number.

It is an amenable number.

25421416 is a deficient number, since it is larger than the sum of its proper divisors (22682684).

25421416 is a wasteful number, since it uses less digits than its factorization.

25421416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29268 (or 29264 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

The square root of 25421416 is about 5041.9654897669. The cubic root of 25421416 is about 294.0355981391.

Adding to 25421416 its reverse (61412452), we get a palindrome (86833868).

The spelling of 25421416 in words is "twenty-five million, four hundred twenty-one thousand, four hundred sixteen".