1766242 has 4 divisors (see below), whose sum is σ = 2649366. Its totient is φ = 883120.

The previous prime is 1766231. The next prime is 1766243. The reversal of 1766242 is 2426671.

It is a Cunningham number, because it is equal to 1329²+1.

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

It can be written as a sum of positive squares in only one way, i.e., 1766241 + 1 = 1329^2 + 1^2 .

It is a super-2 number, since 2×1766242² = 6239221605128, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1766242.

It is not an unprimeable number, because it can be changed into a prime (1766243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 441559 + ... + 441562.

2^1766242 is an apocalyptic number.

1766242 is a deficient number, since it is larger than the sum of its proper divisors (883124).

1766242 is an equidigital number, since it uses as much as digits as its factorization.

1766242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883123.

The product of its digits is 4032, while the sum is 28.

The square root of 1766242 is about 1329.0003762227. Note that the first 3 decimals coincide. The cubic root of 1766242 is about 120.8787803151.

The spelling of 1766242 in words is "one million, seven hundred sixty-six thousand, two hundred forty-two".