1811426 has 4 divisors (see below), whose sum is σ = 2717142. Its totient is φ = 905712.

The previous prime is 1811413. The next prime is 1811431. The reversal of 1811426 is 6241181.

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., 1809025 + 2401 = 1345^2 + 49^2 .

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 452855 + ... + 452858.

2^1811426 is an apocalyptic number.

1811426 is a deficient number, since it is larger than the sum of its proper divisors (905716).

1811426 is an equidigital number, since it uses as much as digits as its factorization.

1811426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905715.

The product of its digits is 384, while the sum is 23.

The square root of 1811426 is about 1345.8922690914. The cubic root of 1811426 is about 121.9008869841.

The spelling of 1811426 in words is "one million, eight hundred eleven thousand, four hundred twenty-six".