1812026 has 4 divisors (see below), whose sum is σ = 2718042. Its totient is φ = 906012.

The previous prime is 1811993. The next prime is 1812037. The reversal of 1812026 is 6202181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6202181 = 257 ⋅24133.

It can be written as a sum of positive squares in only one way, i.e., 1651225 + 160801 = 1285^2 + 401^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1811989 and 1812007.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 453005 + ... + 453008.

2^1812026 is an apocalyptic number.

1812026 is a deficient number, since it is larger than the sum of its proper divisors (906016).

1812026 is an equidigital number, since it uses as much as digits as its factorization.

1812026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906015.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 1812026 is about 1346.1151510922. The cubic root of 1812026 is about 121.9143446059.

The spelling of 1812026 in words is "one million, eight hundred twelve thousand, twenty-six".