25140144 has 40 divisors (see below), whose sum is σ = 68767920. Its totient is φ = 7886848.

The previous prime is 25140139. The next prime is 25140149. The reversal of 25140144 is 44104152.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25140139) and next prime (25140149).

It is a super-3 number, since 3×25140144³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25140144.

It is not an unprimeable number, because it can be changed into a prime (25140149) 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, 14589 + ... + 16220.

It is an arithmetic number, because the mean of its divisors is an integer number (1719198).

Almost surely, 2^25140144 is an apocalyptic number.

25140144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

25140144 is an abundant number, since it is smaller than the sum of its proper divisors (43627776).

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

25140144 is a wasteful number, since it uses less digits than its factorization.

25140144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30837 (or 30831 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 25140144 is about 5013.9948145167. The cubic root of 25140144 is about 292.9471340901.

Adding to 25140144 its reverse (44104152), we get a palindrome (69244296).

The spelling of 25140144 in words is "twenty-five million, one hundred forty thousand, one hundred forty-four".