25120140 has 96 divisors (see below), whose sum is σ = 74511360. Its totient is φ = 6310656.

The previous prime is 25120111. The next prime is 25120141. The reversal of 25120140 is 4102152.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (25120141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 150337 + ... + 150503.

It is an arithmetic number, because the mean of its divisors is an integer number (776160).

Almost surely, 2^25120140 is an apocalyptic number.

25120140 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 25120140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37255680).

25120140 is an abundant number, since it is smaller than the sum of its proper divisors (49391220).

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

25120140 is a wasteful number, since it uses less digits than its factorization.

25120140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311 (or 309 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 25120140 is about 5011.9996009577. Note that the first 3 decimals coincide. The cubic root of 25120140 is about 292.8694141766.

Adding to 25120140 its reverse (4102152), we get a palindrome (29222292).

The spelling of 25120140 in words is "twenty-five million, one hundred twenty thousand, one hundred forty".