2265866 has 4 divisors (see below), whose sum is σ = 3398802. Its totient is φ = 1132932.

The previous prime is 2265841. The next prime is 2265869. The reversal of 2265866 is 6685622.

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

It can be written as a sum of positive squares in only one way, i.e., 2265025 + 841 = 1505^2 + 29^2 .

It is not an unprimeable number, because it can be changed into a prime (2265869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 566465 + ... + 566468.

2^2265866 is an apocalyptic number.

2265866 is a deficient number, since it is larger than the sum of its proper divisors (1132936).

2265866 is a wasteful number, since it uses less digits than its factorization.

2265866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132935.

The product of its digits is 34560, while the sum is 35.

The square root of 2265866 is about 1505.2793760628. The cubic root of 2265866 is about 131.3443536207.

The spelling of 2265866 in words is "two million, two hundred sixty-five thousand, eight hundred sixty-six".