1801122403 has 4 divisors (see below), whose sum is σ = 1808658720. Its totient is φ = 1793586088.

The previous prime is 1801122397. The next prime is 1801122437. The reversal of 1801122403 is 3042211081.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1801122403 - 2¹⁷ = 1800991331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1801128403) 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, 3767800 + ... + 3768277.

It is an arithmetic number, because the mean of its divisors is an integer number (452164680).

Almost surely, 2^1801122403 is an apocalyptic number.

1801122403 is a deficient number, since it is larger than the sum of its proper divisors (7536317).

1801122403 is an equidigital number, since it uses as much as digits as its factorization.

1801122403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7536316.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 1801122403 is about 42439.6324559957. The cubic root of 1801122403 is about 1216.6931866449.

Adding to 1801122403 its reverse (3042211081), we get a palindrome (4843333484).

The spelling of 1801122403 in words is "one billion, eight hundred one million, one hundred twenty-two thousand, four hundred three".