1820007 has 18 divisors (see below), whose sum is σ = 3058848. Its totient is φ = 1039752.

The previous prime is 1819999. The next prime is 1820009. The reversal of 1820007 is 7000281.

It is not a de Polignac number, because 1820007 - 2³ = 1819999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820009) 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 17 ways as a sum of consecutive naturals, for example, 1623 + ... + 2504.

It is an arithmetic number, because the mean of its divisors is an integer number (169936).

2^1820007 is an apocalyptic number.

1820007 is a deficient number, since it is larger than the sum of its proper divisors (1238841).

1820007 is a wasteful number, since it uses less digits than its factorization.

1820007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4147 (or 4137 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 1820007 is about 1349.0763506933. The cubic root of 1820007 is about 122.0930715039.

Adding to 1820007 its reverse (7000281), we get a palindrome (8820288).

The spelling of 1820007 in words is "one million, eight hundred twenty thousand, seven".