25490100 has 36 divisors (see below), whose sum is σ = 73752224. Its totient is φ = 6797280.

The previous prime is 25490081. The next prime is 25490149. The reversal of 25490100 is 109452.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42184 + ... + 42783.

Almost surely, 2^25490100 is an apocalyptic number.

25490100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25490100 is an abundant number, since it is smaller than the sum of its proper divisors (48262124).

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

25490100 is a wasteful number, since it uses less digits than its factorization.

25490100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84984 (or 84977 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 25490100 is about 5048.7721279535. The cubic root of 25490100 is about 294.3001700793.

Adding to 25490100 its reverse (109452), we get a palindrome (25599552).

The spelling of 25490100 in words is "twenty-five million, four hundred ninety thousand, one hundred".