25125140 has 24 divisors (see below), whose sum is σ = 53488680. Its totient is φ = 9911808.

The previous prime is 25125083. The next prime is 25125151. The reversal of 25125140 is 4152152.

It can be written as a sum of positive squares in 4 ways, for example, as 2676496 + 22448644 = 1636^2 + 4738^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7145 + ... + 10064.

It is an arithmetic number, because the mean of its divisors is an integer number (2228695).

Almost surely, 2^25125140 is an apocalyptic number.

25125140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25125140 is an abundant number, since it is smaller than the sum of its proper divisors (28363540).

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

25125140 is a wasteful number, since it uses less digits than its factorization.

25125140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17291 (or 17289 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 25125140 is about 5012.4983790521. The cubic root of 25125140 is about 292.8888441363. Note that the first 4 decimals are identical.

Adding to 25125140 its reverse (4152152), we get a palindrome (29277292).

The spelling of 25125140 in words is "twenty-five million, one hundred twenty-five thousand, one hundred forty".