451866 has 16 divisors (see below), whose sum is σ = 912384. Its totient is φ = 149184.

The previous prime is 451859. The next prime is 451873. The reversal of 451866 is 668154.

It is an interprime number because it is at equal distance from previous prime (451859) and next prime (451873).

It is a nialpdrome in base 14.

It is an unprimeable number.

451866 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 466 + ... + 1058.

It is an arithmetic number, because the mean of its divisors is an integer number (57024).

2⁴⁵¹⁸⁶⁶ is an apocalyptic number.

451866 is an abundant number, since it is smaller than the sum of its proper divisors (460518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

451866 is a wasteful number, since it uses less digits than its factorization.

451866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725.

The product of its digits is 5760, while the sum is 30.

The square root of 451866 is about 672.2097886821. The cubic root of 451866 is about 76.7367181620.

The spelling of 451866 in words is "four hundred fifty-one thousand, eight hundred sixty-six".