25204542 has 48 divisors (see below), whose sum is σ = 56019600. Its totient is φ = 7553920.

The previous prime is 25204513. The next prime is 25204559. The reversal of 25204542 is 24540252.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 108058 + ... + 108290.

It is an arithmetic number, because the mean of its divisors is an integer number (1167075).

Almost surely, 2^25204542 is an apocalyptic number.

25204542 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 25204542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28009800).

25204542 is an abundant number, since it is smaller than the sum of its proper divisors (30815058).

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

25204542 is a wasteful number, since it uses less digits than its factorization.

25204542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409 (or 398 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 25204542 is about 5020.4125328503. The cubic root of 25204542 is about 293.1970547522.

Adding to 25204542 its reverse (24540252), we get a palindrome (49744794).

The spelling of 25204542 in words is "twenty-five million, two hundred four thousand, five hundred forty-two".