1820522 has 16 divisors (see below), whose sum is σ = 3017952. Its totient is φ = 816720.

The previous prime is 1820521. The next prime is 1820527. The reversal of 1820522 is 2250281.

It is a junction number, because it is equal to n+sod(n) for n = 1820494 and 1820503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1328 + ... + 2324.

It is an arithmetic number, because the mean of its divisors is an integer number (188622).

2^1820522 is an apocalyptic number.

1820522 is a deficient number, since it is larger than the sum of its proper divisors (1197430).

1820522 is a wasteful number, since it uses less digits than its factorization.

1820522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1820522 is about 1349.2672085247. The cubic root of 1820522 is about 122.1045864782.

The spelling of 1820522 in words is "one million, eight hundred twenty thousand, five hundred twenty-two".