25205130 has 48 divisors (see below), whose sum is σ = 66193920. Its totient is φ = 6653664.

The previous prime is 25205111. The next prime is 25205137. The reversal of 25205130 is 3150252.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (25205137) 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, 7911 + ... + 10629.

It is an arithmetic number, because the mean of its divisors is an integer number (1379040).

Almost surely, 2^25205130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25205130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33096960).

25205130 is an abundant number, since it is smaller than the sum of its proper divisors (40988790).

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

25205130 is a wasteful number, since it uses less digits than its factorization.

25205130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2835 (or 2832 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 25205130 is about 5020.4710934334. The cubic root of 25205130 is about 293.1993347451.

Adding to 25205130 its reverse (3150252), we get a palindrome (28355382).

The spelling of 25205130 in words is "twenty-five million, two hundred five thousand, one hundred thirty".