4581866 has 4 divisors (see below), whose sum is σ = 6872802. Its totient is φ = 2290932.

The previous prime is 4581859. The next prime is 4581911. The reversal of 4581866 is 6681854.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6681854 = 2 ⋅3340927.

It can be written as a sum of positive squares in only one way, i.e., 2418025 + 2163841 = 1555^2 + 1471^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1145465 + ... + 1145468.

Almost surely, 2^4581866 is an apocalyptic number.

4581866 is a deficient number, since it is larger than the sum of its proper divisors (2290936).

4581866 is a wasteful number, since it uses less digits than its factorization.

4581866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2290935.

The product of its digits is 46080, while the sum is 38.

The square root of 4581866 is about 2140.5293737765. The cubic root of 4581866 is about 166.0915206364.

The spelling of 4581866 in words is "four million, five hundred eighty-one thousand, eight hundred sixty-six".