2265691 has 4 divisors (see below), whose sum is σ = 2287792. Its totient is φ = 2243592.

The previous prime is 2265677. The next prime is 2265721. The reversal of 2265691 is 1965622.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2265691 - 2¹¹ = 2263643 is a prime.

It is a Duffinian number.

2265691 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2265611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10896 + ... + 11101.

It is an arithmetic number, because the mean of its divisors is an integer number (571948).

2^2265691 is an apocalyptic number.

2265691 is a deficient number, since it is larger than the sum of its proper divisors (22101).

2265691 is a wasteful number, since it uses less digits than its factorization.

2265691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22100.

The product of its digits is 6480, while the sum is 31.

The square root of 2265691 is about 1505.2212461961. The cubic root of 2265691 is about 131.3409721537.

The spelling of 2265691 in words is "two million, two hundred sixty-five thousand, six hundred ninety-one".