25450500 has 144 divisors (see below), whose sum is σ = 79881984. Its totient is φ = 6292800.

The previous prime is 25450499. The next prime is 25450507. The reversal of 25450500 is 505452.

It is not an unprimeable number, because it can be changed into a prime (25450507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 541477 + ... + 541523.

It is an arithmetic number, because the mean of its divisors is an integer number (554736).

Almost surely, 2^25450500 is an apocalyptic number.

25450500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25450500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39940992).

25450500 is an abundant number, since it is smaller than the sum of its proper divisors (54431484).

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

25450500 is a wasteful number, since it uses less digits than its factorization.

25450500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107 (or 76 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 21.

The square root of 25450500 is about 5044.8488579937. The cubic root of 25450500 is about 294.1476883040.

Adding to 25450500 its reverse (505452), we get a palindrome (25955952).

The spelling of 25450500 in words is "twenty-five million, four hundred fifty thousand, five hundred".