1816226 has 4 divisors (see below), whose sum is σ = 2724342. Its totient is φ = 908112.

The previous prime is 1816211. The next prime is 1816237. The reversal of 1816226 is 6226181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6226181 = 13 ⋅478937.

It can be written as a sum of positive squares in only one way, i.e., 1092025 + 724201 = 1045^2 + 851^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1816195 and 1816204.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 454055 + ... + 454058.

2^1816226 is an apocalyptic number.

1816226 is a deficient number, since it is larger than the sum of its proper divisors (908116).

1816226 is an equidigital number, since it uses as much as digits as its factorization.

1816226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908115.

The product of its digits is 1152, while the sum is 26.

The square root of 1816226 is about 1347.6742929952. The cubic root of 1816226 is about 122.0084648789.

The spelling of 1816226 in words is "one million, eight hundred sixteen thousand, two hundred twenty-six".