25355140 has 12 divisors (see below), whose sum is σ = 53245836. Its totient is φ = 10142048.

The previous prime is 25355123. The next prime is 25355149. The reversal of 25355140 is 4155352.

It can be written as a sum of positive squares in 2 ways, for example, as 16016004 + 9339136 = 4002^2 + 3056^2 .

It is not an unprimeable number, because it can be changed into a prime (25355149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 633859 + ... + 633898.

It is an arithmetic number, because the mean of its divisors is an integer number (4437153).

Almost surely, 2^25355140 is an apocalyptic number.

25355140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25355140 is an abundant number, since it is smaller than the sum of its proper divisors (27890696).

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

25355140 is a wasteful number, since it uses less digits than its factorization.

25355140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267766 (or 1267764 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 25355140 is about 5035.3887635415. The cubic root of 25355140 is about 293.7798496904.

The spelling of 25355140 in words is "twenty-five million, three hundred fifty-five thousand, one hundred forty".