1801412506 has 4 divisors (see below), whose sum is σ = 2702118762. Its totient is φ = 900706252.

The previous prime is 1801412479. The next prime is 1801412519. The reversal of 1801412506 is 6052141081.

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

It can be written as a sum of positive squares in only one way, i.e., 1302560281 + 498852225 = 36091^2 + 22335^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450353125 + ... + 450353128.

Almost surely, 2^1801412506 is an apocalyptic number.

1801412506 is a deficient number, since it is larger than the sum of its proper divisors (900706256).

1801412506 is an equidigital number, since it uses as much as digits as its factorization.

1801412506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900706255.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 1801412506 is about 42443.0501495828. The cubic root of 1801412506 is about 1216.7585065428.

Adding to 1801412506 its reverse (6052141081), we get a palindrome (7853553587).

The spelling of 1801412506 in words is "one billion, eight hundred one million, four hundred twelve thousand, five hundred six".