1678874 has 4 divisors (see below), whose sum is σ = 2518314. Its totient is φ = 839436.

The previous prime is 1678871. The next prime is 1678877. The reversal of 1678874 is 4788761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4788761 = 23 ⋅208207.

It is an interprime number because it is at equal distance from previous prime (1678871) and next prime (1678877).

It can be written as a sum of positive squares in only one way, i.e., 1677025 + 1849 = 1295^2 + 43^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1678871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419717 + ... + 419720.

2^1678874 is an apocalyptic number.

1678874 is a deficient number, since it is larger than the sum of its proper divisors (839440).

1678874 is an equidigital number, since it uses as much as digits as its factorization.

1678874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839439.

The product of its digits is 75264, while the sum is 41.

The square root of 1678874 is about 1295.7137029452. The cubic root of 1678874 is about 118.8518741666.

It can be divided in two parts, 1678 and 874, that added together give a palindrome (2552).

The spelling of 1678874 in words is "one million, six hundred seventy-eight thousand, eight hundred seventy-four".