25142939 has 4 divisors (see below), whose sum is σ = 25191720. Its totient is φ = 25094160.

The previous prime is 25142927. The next prime is 25142989. The reversal of 25142939 is 93924152.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25142939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25142899 and 25142908.

It is not an unprimeable number, because it can be changed into a prime (25142989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23609 + ... + 24650.

It is an arithmetic number, because the mean of its divisors is an integer number (6297930).

Almost surely, 2^25142939 is an apocalyptic number.

25142939 is a deficient number, since it is larger than the sum of its proper divisors (48781).

25142939 is an equidigital number, since it uses as much as digits as its factorization.

25142939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48780.

The product of its digits is 19440, while the sum is 35.

The square root of 25142939 is about 5014.2735266437. The cubic root of 25142939 is about 292.9579899932.

The spelling of 25142939 in words is "twenty-five million, one hundred forty-two thousand, nine hundred thirty-nine".