25801489 has 8 divisors (see below), whose sum is σ = 30089600. Its totient is φ = 22115268.

The previous prime is 25801459. The next prime is 25801507. The reversal of 25801489 is 98410852.

It is not a de Polignac number, because 25801489 - 2⁷ = 25801361 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (25801409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37269 + ... + 37954.

It is an arithmetic number, because the mean of its divisors is an integer number (3761200).

Almost surely, 2^25801489 is an apocalyptic number.

It is an amenable number.

25801489 is a deficient number, since it is larger than the sum of its proper divisors (4288111).

25801489 is an frugal number, since it uses more digits than its factorization.

25801489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75244 (or 75230 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 25801489 is about 5079.5166108597. The cubic root of 25801489 is about 295.4937207771.

The spelling of 25801489 in words is "twenty-five million, eight hundred one thousand, four hundred eighty-nine".