25872739 has 4 divisors (see below), whose sum is σ = 26311320. Its totient is φ = 25434160.

The previous prime is 25872719. The next prime is 25872757. The reversal of 25872739 is 93727852.

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 25872739 - 2¹³ = 25864547 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25872695 and 25872704.

It is not an unprimeable number, because it can be changed into a prime (25872719) 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, 219202 + ... + 219319.

It is an arithmetic number, because the mean of its divisors is an integer number (6577830).

Almost surely, 2^25872739 is an apocalyptic number.

25872739 is a deficient number, since it is larger than the sum of its proper divisors (438581).

25872739 is an equidigital number, since it uses as much as digits as its factorization.

25872739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438580.

The product of its digits is 211680, while the sum is 43.

The square root of 25872739 is about 5086.5252383135. The cubic root of 25872739 is about 295.7654696590.

The spelling of 25872739 in words is "twenty-five million, eight hundred seventy-two thousand, seven hundred thirty-nine".