25155140 has 24 divisors (see below), whose sum is σ = 54115992. Its totient is φ = 9816320.

The previous prime is 25155113. The next prime is 25155149. The reversal of 25155140 is 4155152.

It is a happy number.

25155140 is nontrivially palindromic in base 9.

It can be written as a sum of positive squares in 4 ways, for example, as 692224 + 24462916 = 832^2 + 4946^2 .

It is a super-3 number, since 3×25155140³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (25155149) 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, 14519 + ... + 16158.

It is an arithmetic number, because the mean of its divisors is an integer number (2254833).

Almost surely, 2^25155140 is an apocalyptic number.

25155140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25155140 is an abundant number, since it is smaller than the sum of its proper divisors (28960852).

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

25155140 is a wasteful number, since it uses less digits than its factorization.

25155140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30727 (or 30725 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 25155140 is about 5015.4900059715. The cubic root of 25155140 is about 293.0053697952.

The spelling of 25155140 in words is "twenty-five million, one hundred fifty-five thousand, one hundred forty".