2045866 has 4 divisors (see below), whose sum is σ = 3068802. Its totient is φ = 1022932.

The previous prime is 2045851. The next prime is 2045881. The reversal of 2045866 is 6685402.

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

It is an interprime number because it is at equal distance from previous prime (2045851) and next prime (2045881).

It can be written as a sum of positive squares in only one way, i.e., 1490841 + 555025 = 1221^2 + 745^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511465 + ... + 511468.

2^2045866 is an apocalyptic number.

2045866 is a deficient number, since it is larger than the sum of its proper divisors (1022936).

2045866 is a wasteful number, since it uses less digits than its factorization.

2045866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1022935.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 2045866 is about 1430.3377223579. The cubic root of 2045866 is about 126.9479605752.

The spelling of 2045866 in words is "two million, forty-five thousand, eight hundred sixty-six".