25285000 has 80 divisors (see below), whose sum is σ = 63963900. Its totient is φ = 9312000.

The previous prime is 25284983. The next prime is 25285009. The reversal of 25285000 is 58252.

It can be written as a sum of positive squares in 10 ways, for example, as 8491396 + 16793604 = 2914^2 + 4098^2 .

It is not an unprimeable number, because it can be changed into a prime (25285009) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 64806 + ... + 65194.

Almost surely, 2^25285000 is an apocalyptic number.

25285000 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 25285000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31981950).

25285000 is an abundant number, since it is smaller than the sum of its proper divisors (38678900).

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

25285000 is a wasteful number, since it uses less digits than its factorization.

25285000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428 (or 409 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 25285000 is about 5028.4192347099. The cubic root of 25285000 is about 293.5087048198.

The spelling of 25285000 in words is "twenty-five million, two hundred eighty-five thousand".