1812766 has 4 divisors (see below), whose sum is σ = 2719152. Its totient is φ = 906382.

The previous prime is 1812763. The next prime is 1812773. The reversal of 1812766 is 6672181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6672181 = 43 ⋅155167.

It is a super-2 number, since 2×1812766² = 6572241141512, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1812763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 453190 + ... + 453193.

It is an arithmetic number, because the mean of its divisors is an integer number (679788).

2^1812766 is an apocalyptic number.

1812766 is a deficient number, since it is larger than the sum of its proper divisors (906386).

1812766 is an equidigital number, since it uses as much as digits as its factorization.

1812766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906385.

The product of its digits is 4032, while the sum is 31.

The square root of 1812766 is about 1346.3899880792. The cubic root of 1812766 is about 121.9309382487.

The spelling of 1812766 in words is "one million, eight hundred twelve thousand, seven hundred sixty-six".