25712789 has 4 divisors (see below), whose sum is σ = 27225324. Its totient is φ = 24200256.

The previous prime is 25712783. The next prime is 25712803. The reversal of 25712789 is 98721752.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21003889 + 4708900 = 4583^2 + 2170^2 .

It is a cyclic number.

It is not a de Polignac number, because 25712789 - 2¹² = 25708693 is a prime.

It is a super-2 number, since 2×25712789² = 1322295036317042, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25712783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 756242 + ... + 756275.

It is an arithmetic number, because the mean of its divisors is an integer number (6806331).

Almost surely, 2^25712789 is an apocalyptic number.

It is an amenable number.

25712789 is a deficient number, since it is larger than the sum of its proper divisors (1512535).

25712789 is a wasteful number, since it uses less digits than its factorization.

25712789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1512534.

The product of its digits is 70560, while the sum is 41.

The square root of 25712789 is about 5070.7779482048. Note that the first 3 decimals coincide. The cubic root of 25712789 is about 295.1547172715.

The spelling of 25712789 in words is "twenty-five million, seven hundred twelve thousand, seven hundred eighty-nine".