25442709 has 4 divisors (see below), whose sum is σ = 33923616. Its totient is φ = 16961804.

The previous prime is 25442707. The next prime is 25442719. The reversal of 25442709 is 90724452.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25442709 - 2¹ = 25442707 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25442709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25442701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4240449 + ... + 4240454.

It is an arithmetic number, because the mean of its divisors is an integer number (8480904).

Almost surely, 2^25442709 is an apocalyptic number.

It is an amenable number.

25442709 is a deficient number, since it is larger than the sum of its proper divisors (8480907).

25442709 is an equidigital number, since it uses as much as digits as its factorization.

25442709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8480906.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 25442709 is about 5044.0766251119. The cubic root of 25442709 is about 294.1176700525.

It can be divided in two parts, 2544 and 2709, that added together give a triangular number (5253 = T₁₀₂).

The spelling of 25442709 in words is "twenty-five million, four hundred forty-two thousand, seven hundred nine".