25415240 has 32 divisors (see below), whose sum is σ = 57646080. Its totient is φ = 10084032.

The previous prime is 25415239. The next prime is 25415251. The reversal of 25415240 is 4251452.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2579 + ... + 7581.

It is an arithmetic number, because the mean of its divisors is an integer number (1801440).

Almost surely, 2^25415240 is an apocalyptic number.

25415240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25415240 is an abundant number, since it is smaller than the sum of its proper divisors (32230840).

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

25415240 is a wasteful number, since it uses less digits than its factorization.

25415240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5141 (or 5137 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 25415240 is about 5041.3529929970. The cubic root of 25415240 is about 294.0117847406.

Adding to 25415240 its reverse (4251452), we get a palindrome (29666692).

The spelling of 25415240 in words is "twenty-five million, four hundred fifteen thousand, two hundred forty".