2265891 has 8 divisors (see below), whose sum is σ = 3152640. Its totient is φ = 1444872.

The previous prime is 2265881. The next prime is 2265899. The reversal of 2265891 is 1985622.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2265891 - 2¹¹ = 2263843 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

2265891 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2265899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16351 + ... + 16488.

It is an arithmetic number, because the mean of its divisors is an integer number (394080).

2^2265891 is an apocalyptic number.

2265891 is a deficient number, since it is larger than the sum of its proper divisors (886749).

2265891 is a wasteful number, since it uses less digits than its factorization.

2265891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32865.

The product of its digits is 8640, while the sum is 33.

The square root of 2265891 is about 1505.2876801462. The cubic root of 2265891 is about 131.3448366732.

The spelling of 2265891 in words is "two million, two hundred sixty-five thousand, eight hundred ninety-one".