1821874 has 8 divisors (see below), whose sum is σ = 2743020. Its totient is φ = 907536.

The previous prime is 1821871. The next prime is 1821877. The reversal of 1821874 is 4781281.

It is an interprime number because it is at equal distance from previous prime (1821871) and next prime (1821877).

It can be written as a sum of positive squares in 2 ways, for example, as 1803649 + 18225 = 1343^2 + 135^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1821871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 969 + ... + 2140.

2^1821874 is an apocalyptic number.

1821874 is a deficient number, since it is larger than the sum of its proper divisors (921146).

1821874 is a wasteful number, since it uses less digits than its factorization.

1821874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3404.

The product of its digits is 3584, while the sum is 31.

The square root of 1821874 is about 1349.7681282354. The cubic root of 1821874 is about 122.1348057507.

The spelling of 1821874 in words is "one million, eight hundred twenty-one thousand, eight hundred seventy-four".