25406789 has 16 divisors (see below), whose sum is σ = 28304640. Its totient is φ = 22682880.

The previous prime is 25406783. The next prime is 25406791. The reversal of 25406789 is 98760452.

It is a cyclic number.

It is not a de Polignac number, because 25406789 - 2¹² = 25402693 is a prime.

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 (25406783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70592 + ... + 70950.

It is an arithmetic number, because the mean of its divisors is an integer number (1769040).

Almost surely, 2^25406789 is an apocalyptic number.

It is an amenable number.

25406789 is a deficient number, since it is larger than the sum of its proper divisors (2897851).

25406789 is a wasteful number, since it uses less digits than its factorization.

With its successor (25406790) it forms an eRAP, since the sums of their prime factors are consecutive (580 and 581).

25406789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 25406789 is about 5040.5147554590. The cubic root of 25406789 is about 293.9791931532.

The spelling of 25406789 in words is "twenty-five million, four hundred six thousand, seven hundred eighty-nine".