2505889 has 3 divisors (see below), whose sum is σ = 2507473.
Its totient is φ = 2504306.
The previous prime is 2505863. The next prime is 2505901. The reversal of 2505889 is 9885052.
It is a happy number.
The square root of 2505889 is 1583.
It is a perfect power (a square), and thus also a powerful number.
It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.
It is not a de Polignac number, because 2505889 - 25 = 2505857 is a prime.
It is an Ulam number.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (2505809) by changing a digit.
It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 792 + ... + 2374.
22505889 is an apocalyptic number.
2505889 is the 1583-rd square number.
2505889 is the 792-nd centered octagonal number.
It is an amenable number.
2505889 is a deficient number, since it is larger than the sum of its proper divisors (1584).
2505889 is an frugal number, since it uses more digits than its factorization.
2505889 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 3166 (or 1583 counting only the distinct ones).
The product of its (nonzero) digits is 28800, while the sum is 37.
The cubic root of 2505889 is about 135.8273652975.
The spelling of 2505889 in words is "two million, five hundred five thousand, eight hundred eighty-nine".