1820049 has 16 divisors (see below), whose sum is σ = 3025920. Its totient is φ = 945360.

The previous prime is 1820047. The next prime is 1820051. The reversal of 1820049 is 9400281.

It is an interprime number because it is at equal distance from previous prime (1820047) and next prime (1820051).

It is not a de Polignac number, because 1820049 - 2¹ = 1820047 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1820047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3709 + ... + 4170.

It is an arithmetic number, because the mean of its divisors is an integer number (189120).

2^1820049 is an apocalyptic number.

It is an amenable number.

1820049 is a deficient number, since it is larger than the sum of its proper divisors (1205871).

1820049 is a wasteful number, since it uses less digits than its factorization.

1820049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7900.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 1820049 is about 1349.0919168092. The cubic root of 1820049 is about 122.0940106705.

The spelling of 1820049 in words is "one million, eight hundred twenty thousand, forty-nine".