1866133 has 4 divisors (see below), whose sum is σ = 1869228. Its totient is φ = 1863040.

The previous prime is 1866131. The next prime is 1866143. The reversal of 1866133 is 3316681.

1866133 is nontrivially palindromic in base 6.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1129969 + 736164 = 1063^2 + 858^2 .

It is a cyclic number.

It is not a de Polignac number, because 1866133 - 2¹ = 1866131 is a prime.

It is a Duffinian number.

1866133 is a lucky number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1866131) 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, 316 + ... + 1957.

It is an arithmetic number, because the mean of its divisors is an integer number (467307).

2^1866133 is an apocalyptic number.

It is an amenable number.

1866133 is a deficient number, since it is larger than the sum of its proper divisors (3095).

1866133 is an equidigital number, since it uses as much as digits as its factorization.

1866133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3094.

The product of its digits is 2592, while the sum is 28.

The square root of 1866133 is about 1366.0647861650. The cubic root of 1866133 is about 123.1159151396.

The spelling of 1866133 in words is "one million, eight hundred sixty-six thousand, one hundred thirty-three".