1820061 has 12 divisors (see below), whose sum is σ = 2690688. Its totient is φ = 1184904.

The previous prime is 1820051. The next prime is 1820087. The reversal of 1820061 is 1600281.

It is not a de Polignac number, because 1820061 - 2⁷ = 1819933 is a prime.

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

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1965 + ... + 2738.

It is an arithmetic number, because the mean of its divisors is an integer number (224224).

2^1820061 is an apocalyptic number.

It is an amenable number.

1820061 is a deficient number, since it is larger than the sum of its proper divisors (870627).

1820061 is a wasteful number, since it uses less digits than its factorization.

1820061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4752 (or 4749 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 1820061 is about 1349.0963642379. The cubic root of 1820061 is about 122.0942790012.

The spelling of 1820061 in words is "one million, eight hundred twenty thousand, sixty-one".