1820053 has 4 divisors (see below), whose sum is σ = 1824448. Its totient is φ = 1815660.

The previous prime is 1820051. The next prime is 1820087. The reversal of 1820053 is 3500281.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1820053 - 2¹ = 1820051 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1820053.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820051) 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, 1503 + ... + 2428.

It is an arithmetic number, because the mean of its divisors is an integer number (456112).

2^1820053 is an apocalyptic number.

It is an amenable number.

1820053 is a deficient number, since it is larger than the sum of its proper divisors (4395).

1820053 is an equidigital number, since it uses as much as digits as its factorization.

1820053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4394.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1820053 is about 1349.0933992871. The cubic root of 1820053 is about 122.0941001142.

The spelling of 1820053 in words is "one million, eight hundred twenty thousand, fifty-three".