1810426 has 4 divisors (see below), whose sum is σ = 2715642. Its totient is φ = 905212.

The previous prime is 1810423. The next prime is 1810433. The reversal of 1810426 is 6240181.

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., 1651225 + 159201 = 1285^2 + 399^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1810397 and 1810406.

It is not an unprimeable number, because it can be changed into a prime (1810421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 452605 + ... + 452608.

2^1810426 is an apocalyptic number.

1810426 is a deficient number, since it is larger than the sum of its proper divisors (905216).

1810426 is an equidigital number, since it uses as much as digits as its factorization.

1810426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905215.

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

The square root of 1810426 is about 1345.5207170460. The cubic root of 1810426 is about 121.8784510090.

The spelling of 1810426 in words is "one million, eight hundred ten thousand, four hundred twenty-six".