25157143 has 4 divisors (see below), whose sum is σ = 27444168. Its totient is φ = 22870120.

The previous prime is 25157137. The next prime is 25157177. The reversal of 25157143 is 34175152.

It is a happy number.

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 25157143 - 2⁹ = 25156631 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 (25157113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1143496 + ... + 1143517.

It is an arithmetic number, because the mean of its divisors is an integer number (6861042).

Almost surely, 2^25157143 is an apocalyptic number.

25157143 is a deficient number, since it is larger than the sum of its proper divisors (2287025).

25157143 is a wasteful number, since it uses less digits than its factorization.

25157143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2287024.

The product of its digits is 4200, while the sum is 28.

The square root of 25157143 is about 5015.6896833835. The cubic root of 25157143 is about 293.0131465250.

Subtracting 25157143 from its reverse (34175152), we obtain a square (9018009 = 3003²).

The spelling of 25157143 in words is "twenty-five million, one hundred fifty-seven thousand, one hundred forty-three".