25340047 has 4 divisors (see below), whose sum is σ = 26830656. Its totient is φ = 23849440.

The previous prime is 25340039. The next prime is 25340057. The reversal of 25340047 is 74004352.

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 25340047 - 2³ = 25340039 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 (25340017) 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, 745279 + ... + 745312.

It is an arithmetic number, because the mean of its divisors is an integer number (6707664).

Almost surely, 2^25340047 is an apocalyptic number.

25340047 is a deficient number, since it is larger than the sum of its proper divisors (1490609).

25340047 is a wasteful number, since it uses less digits than its factorization.

25340047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1490608.

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 25340047 is about 5033.8898478215. The cubic root of 25340047 is about 293.7215459386.

Adding to 25340047 its reverse (74004352), we get a palindrome (99344399).

The spelling of 25340047 in words is "twenty-five million, three hundred forty thousand, forty-seven".