25120000 has 90 divisors (see below), whose sum is σ = 63056378. Its totient is φ = 9984000.

The previous prime is 25119989. The next prime is 25120001. The reversal of 25120000 is 2152.

It can be written as a sum of positive squares in 5 ways, for example, as 12503296 + 12616704 = 3536^2 + 3552^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25120001) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 159922 + ... + 160078.

Almost surely, 2^25120000 is an apocalyptic number.

25120000 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 25120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31528189).

25120000 is an abundant number, since it is smaller than the sum of its proper divisors (37936378).

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

25120000 is an frugal number, since it uses more digits than its factorization.

25120000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193 (or 164 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 25120000 is about 5011.9856344567. The cubic root of 25120000 is about 292.8688701006.

Adding to 25120000 its reverse (2152), we get a palindrome (25122152).

It can be divided in two parts, 2 and 5120000, that multiplied together give a square (10240000 = 3200²).

The spelling of 25120000 in words is "twenty-five million, one hundred twenty thousand".