25140143 has 4 divisors (see below), whose sum is σ = 28731600. Its totient is φ = 21548688.

The previous prime is 25140139. The next prime is 25140149. The reversal of 25140143 is 34104152.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 25140143 - 2² = 25140139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25140149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1795718 + ... + 1795731.

It is an arithmetic number, because the mean of its divisors is an integer number (7182900).

Almost surely, 2^25140143 is an apocalyptic number.

25140143 is a deficient number, since it is larger than the sum of its proper divisors (3591457).

25140143 is an equidigital number, since it uses as much as digits as its factorization.

25140143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3591456.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 25140143 is about 5013.9947147958. The cubic root of 25140143 is about 292.9471302060.

Adding to 25140143 its reverse (34104152), we get a palindrome (59244295).

The spelling of 25140143 in words is "twenty-five million, one hundred forty thousand, one hundred forty-three".