25312729 has 8 divisors (see below), whose sum is σ = 27377280. Its totient is φ = 23264976.

The previous prime is 25312723. The next prime is 25312733. The reversal of 25312729 is 92721352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25312729 - 2⁵ = 25312697 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 25312729.

It is not an unprimeable number, because it can be changed into a prime (25312723) 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 7 ways as a sum of consecutive naturals, for example, 967 + ... + 7180.

It is an arithmetic number, because the mean of its divisors is an integer number (3422160).

Almost surely, 2^25312729 is an apocalyptic number.

It is an amenable number.

25312729 is a deficient number, since it is larger than the sum of its proper divisors (2064551).

25312729 is a wasteful number, since it uses less digits than its factorization.

25312729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8399.

The product of its digits is 7560, while the sum is 31.

The square root of 25312729 is about 5031.1757075260. The cubic root of 25312729 is about 293.6159585217.

It can be divided in two parts, 2531272 and 9, that added together give a square (2531281 = 1591²).

The spelling of 25312729 in words is "twenty-five million, three hundred twelve thousand, seven hundred twenty-nine".