25251340 has 24 divisors (see below), whose sum is σ = 53126640. Its totient is φ = 10081728.

The previous prime is 25251337. The next prime is 25251349. The reversal of 25251340 is 4315252.

It is not an unprimeable number, because it can be changed into a prime (25251349) 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, 15819 + ... + 17341.

It is an arithmetic number, because the mean of its divisors is an integer number (2213610).

Almost surely, 2^25251340 is an apocalyptic number.

25251340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25251340 is an abundant number, since it is smaller than the sum of its proper divisors (27875300).

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

25251340 is a wasteful number, since it uses less digits than its factorization.

25251340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2361 (or 2359 counting only the distinct ones).

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

The square root of 25251340 is about 5025.0711437750. The cubic root of 25251340 is about 293.3784050347.

Adding to 25251340 its reverse (4315252), we get a palindrome (29566592).

The spelling of 25251340 in words is "twenty-five million, two hundred fifty-one thousand, three hundred forty".