1790842 has 4 divisors (see below), whose sum is σ = 2686266. Its totient is φ = 895420.

The previous prime is 1790819. The next prime is 1790857. The reversal of 1790842 is 2480971.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2480971 = 43 ⋅57697.

It can be written as a sum of positive squares in only one way, i.e., 1343281 + 447561 = 1159^2 + 669^2 .

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 an Ulam 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, 447709 + ... + 447712.

2^1790842 is an apocalyptic number.

1790842 is a deficient number, since it is larger than the sum of its proper divisors (895424).

1790842 is an equidigital number, since it uses as much as digits as its factorization.

1790842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895423.

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

The square root of 1790842 is about 1338.2234492042. The cubic root of 1790842 is about 121.4373897699.

The spelling of 1790842 in words is "one million, seven hundred ninety thousand, eight hundred forty-two".