25745489 has 16 divisors (see below), whose sum is σ = 32247936. Its totient is φ = 19968000.

The previous prime is 25745479. The next prime is 25745509. The reversal of 25745489 is 98454752.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 25745489 - 2²⁰ = 24696913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25745479) 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, 19139 + ... + 20439.

It is an arithmetic number, because the mean of its divisors is an integer number (2015496).

Almost surely, 2^25745489 is an apocalyptic number.

It is an amenable number.

25745489 is a deficient number, since it is larger than the sum of its proper divisors (6502447).

25745489 is a wasteful number, since it uses less digits than its factorization.

25745489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1576.

The product of its digits is 403200, while the sum is 44.

The square root of 25745489 is about 5074.0012810404. The cubic root of 25745489 is about 295.2797843567.

The spelling of 25745489 in words is "twenty-five million, seven hundred forty-five thousand, four hundred eighty-nine".