1820073 has 8 divisors (see below), whose sum is σ = 2472768. Its totient is φ = 1190384.

The previous prime is 1820051. The next prime is 1820087. The reversal of 1820073 is 3700281.

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

It is a cyclic number.

It is not a de Polignac number, because 1820073 - 2⁶ = 1820009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1820023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5565 + ... + 5882.

It is an arithmetic number, because the mean of its divisors is an integer number (309096).

2^1820073 is an apocalyptic number.

It is an amenable number.

1820073 is a deficient number, since it is larger than the sum of its proper divisors (652695).

1820073 is a wasteful number, since it uses less digits than its factorization.

1820073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11503.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 1820073 is about 1349.1008116520. The cubic root of 1820073 is about 122.0945473307.

The spelling of 1820073 in words is "one million, eight hundred twenty thousand, seventy-three".