25749047 has 6 divisors (see below), whose sum is σ = 27175968. Its totient is φ = 24393492.

The previous prime is 25749037. The next prime is 25749079. The reversal of 25749047 is 74094752.

It is not a de Polignac number, because 25749047 - 2⁸ = 25748791 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25749047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25749037) 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 5 ways as a sum of consecutive naturals, for example, 35303 + ... + 36024.

It is an arithmetic number, because the mean of its divisors is an integer number (4529328).

Almost surely, 2^25749047 is an apocalyptic number.

25749047 is a deficient number, since it is larger than the sum of its proper divisors (1426921).

25749047 is an equidigital number, since it uses as much as digits as its factorization.

25749047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71365 (or 71346 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 25749047 is about 5074.3518797971. The cubic root of 25749047 is about 295.2933861839.

The spelling of 25749047 in words is "twenty-five million, seven hundred forty-nine thousand, forty-seven".