25250004 has 72 divisors (see below), whose sum is σ = 69366752. Its totient is φ = 7698240.

The previous prime is 25250003. The next prime is 25250033. The reversal of 25250004 is 40005252.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25250003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76119 + ... + 76449.

Almost surely, 2^25250004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25250004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34683376).

25250004 is an abundant number, since it is smaller than the sum of its proper divisors (44116748).

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

25250004 is a wasteful number, since it uses less digits than its factorization.

25250004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517 (or 512 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 25250004 is about 5024.9382085753. The cubic root of 25250004 is about 293.3732309138.

Adding to 25250004 its reverse (40005252), we get a palindrome (65255256).

The spelling of 25250004 in words is "twenty-five million, two hundred fifty thousand, four".