25261140 has 24 divisors (see below), whose sum is σ = 70731360. Its totient is φ = 6736288.

The previous prime is 25261129. The next prime is 25261141. The reversal of 25261140 is 4116252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25261141) 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, 210450 + ... + 210569.

It is an arithmetic number, because the mean of its divisors is an integer number (2947140).

Almost surely, 2^25261140 is an apocalyptic number.

25261140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25261140 is an abundant number, since it is smaller than the sum of its proper divisors (45470220).

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

25261140 is a wasteful number, since it uses less digits than its factorization.

25261140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421031 (or 421029 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 25261140 is about 5026.0461597562. The cubic root of 25261140 is about 293.4163533378.

Adding to 25261140 its reverse (4116252), we get a palindrome (29377392).

The spelling of 25261140 in words is "twenty-five million, two hundred sixty-one thousand, one hundred forty".