1803874 has 4 divisors (see below), whose sum is σ = 2705814. Its totient is φ = 901936.

The previous prime is 1803863. The next prime is 1803881. The reversal of 1803874 is 4783081.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4783081 = 137 ⋅34913.

It can be written as a sum of positive squares in only one way, i.e., 1803649 + 225 = 1343^2 + 15^2 .

It is a super-2 number, since 2×1803874² = 6507922815752, 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 an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450967 + ... + 450970.

2^1803874 is an apocalyptic number.

1803874 is a deficient number, since it is larger than the sum of its proper divisors (901940).

1803874 is an equidigital number, since it uses as much as digits as its factorization.

1803874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901939.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 1803874 is about 1343.0837650720. The cubic root of 1803874 is about 121.7312457146.

The spelling of 1803874 in words is "one million, eight hundred three thousand, eight hundred seventy-four".