1821974 has 16 divisors (see below), whose sum is σ = 3407616. Its totient is φ = 709800.

The previous prime is 1821959. The next prime is 1821997. The reversal of 1821974 is 4791281.

It is a self number, because there is not a number n which added to its sum of digits gives 1821974.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5762 + ... + 6069.

It is an arithmetic number, because the mean of its divisors is an integer number (212976).

2^1821974 is an apocalyptic number.

1821974 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1821974 is a deficient number, since it is larger than the sum of its proper divisors (1585642).

1821974 is a wasteful number, since it uses less digits than its factorization.

1821974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11851.

The product of its digits is 4032, while the sum is 32.

The square root of 1821974 is about 1349.8051711266. The cubic root of 1821974 is about 122.1370403102.

The spelling of 1821974 in words is "one million, eight hundred twenty-one thousand, nine hundred seventy-four".