25340143 has 4 divisors (see below), whose sum is σ = 25495768. Its totient is φ = 25184520.

The previous prime is 25340131. The next prime is 25340177. The reversal of 25340143 is 34104352.

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

It is a cyclic number.

It is not a de Polignac number, because 25340143 - 2⁵ = 25340111 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 (25340443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77568 + ... + 77893.

It is an arithmetic number, because the mean of its divisors is an integer number (6373942).

Almost surely, 2^25340143 is an apocalyptic number.

25340143 is a deficient number, since it is larger than the sum of its proper divisors (155625).

25340143 is a wasteful number, since it uses less digits than its factorization.

25340143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155624.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 25340143 is about 5033.8993831820. The cubic root of 25340143 is about 293.7219168565.

Adding to 25340143 its reverse (34104352), we get a palindrome (59444495).

The spelling of 25340143 in words is "twenty-five million, three hundred forty thousand, one hundred forty-three".