25135240 has 32 divisors (see below), whose sum is σ = 60905880. Its totient is φ = 9280512.

The previous prime is 25135237. The next prime is 25135241. The reversal of 25135240 is 4253152.

It can be written as a sum of positive squares in 4 ways, for example, as 20304036 + 4831204 = 4506^2 + 2198^2 .

It is not an unprimeable number, because it can be changed into a prime (25135241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23649 + ... + 24688.

Almost surely, 2^25135240 is an apocalyptic number.

25135240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25135240 is an abundant number, since it is smaller than the sum of its proper divisors (35770640).

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

25135240 is a wasteful number, since it uses less digits than its factorization.

25135240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48361 (or 48357 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 25135240 is about 5013.5057594462. The cubic root of 25135240 is about 292.9280847937.

Adding to 25135240 its reverse (4253152), we get a palindrome (29388392).

The spelling of 25135240 in words is "twenty-five million, one hundred thirty-five thousand, two hundred forty".