25745047 has 4 divisors (see below), whose sum is σ = 25915696. Its totient is φ = 25574400.

The previous prime is 25745039. The next prime is 25745051. The reversal of 25745047 is 74054752.

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 25745047 - 2³ = 25745039 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 (25745087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85098 + ... + 85399.

It is an arithmetic number, because the mean of its divisors is an integer number (6478924).

Almost surely, 2^25745047 is an apocalyptic number.

25745047 is a deficient number, since it is larger than the sum of its proper divisors (170649).

25745047 is a wasteful number, since it uses less digits than its factorization.

25745047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170648.

The product of its (nonzero) digits is 39200, while the sum is 34.

The square root of 25745047 is about 5073.9577254841. The cubic root of 25745047 is about 295.2780945537.

Adding to 25745047 its reverse (74054752), we get a palindrome (99799799).

The spelling of 25745047 in words is "twenty-five million, seven hundred forty-five thousand, forty-seven".