25421244 has 12 divisors (see below), whose sum is σ = 59316264. Its totient is φ = 8473744.

The previous prime is 25421237. The next prime is 25421251. The reversal of 25421244 is 44212452.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25421237) and next prime (25421251).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1059207 + ... + 1059230.

It is an arithmetic number, because the mean of its divisors is an integer number (4943022).

Almost surely, 2^25421244 is an apocalyptic number.

It is an amenable number.

25421244 is an abundant number, since it is smaller than the sum of its proper divisors (33895020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25421244 is a wasteful number, since it uses less digits than its factorization.

25421244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2118444 (or 2118442 counting only the distinct ones).

The product of its digits is 2560, while the sum is 24.

The square root of 25421244 is about 5041.9484328977. The cubic root of 25421244 is about 294.0349349944.

Adding to 25421244 its reverse (44212452), we get a palindrome (69633696).

The spelling of 25421244 in words is "twenty-five million, four hundred twenty-one thousand, two hundred forty-four".