25389645 has 16 divisors (see below), whose sum is σ = 42024960. Its totient is φ = 13073984.

The previous prime is 25389629. The next prime is 25389649. The reversal of 25389645 is 54698352.

It is a cyclic number.

It is not a de Polignac number, because 25389645 - 2⁴ = 25389629 is a prime.

It is a super-3 number, since 3×25389645³ (a number of 23 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25389597 and 25389606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25389649) 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, 28749 + ... + 29618.

It is an arithmetic number, because the mean of its divisors is an integer number (2626560).

Almost surely, 2^25389645 is an apocalyptic number.

It is an amenable number.

25389645 is a deficient number, since it is larger than the sum of its proper divisors (16635315).

25389645 is a wasteful number, since it uses less digits than its factorization.

25389645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58404.

The product of its digits is 259200, while the sum is 42.

The square root of 25389645 is about 5038.8138485163. The cubic root of 25389645 is about 293.9130544879.

It can be divided in two parts, 253 and 89645, that added together give a palindrome (89898).

The spelling of 25389645 in words is "twenty-five million, three hundred eighty-nine thousand, six hundred forty-five".