25130720 has 48 divisors (see below), whose sum is σ = 61961760. Its totient is φ = 9613824.

The previous prime is 25130687. The next prime is 25130737. The reversal of 25130720 is 2703152.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 25130692 and 25130701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266 + ... + 7094.

It is an arithmetic number, because the mean of its divisors is an integer number (1290870).

Almost surely, 2^25130720 is an apocalyptic number.

25130720 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 25130720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30980880).

25130720 is an abundant number, since it is smaller than the sum of its proper divisors (36831040).

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

25130720 is a wasteful number, since it uses less digits than its factorization.

25130720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6867 (or 6859 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 25130720 is about 5013.0549568103. The cubic root of 25130720 is about 292.9105249280.

Adding to 25130720 its reverse (2703152), we get a palindrome (27833872).

The spelling of 25130720 in words is "twenty-five million, one hundred thirty thousand, seven hundred twenty".