1816634 has 4 divisors (see below), whose sum is σ = 2724954. Its totient is φ = 908316.

The previous prime is 1816627. The next prime is 1816643. The reversal of 1816634 is 4366181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4366181 = 19 ⋅229799.

It can be written as a sum of positive squares in only one way, i.e., 1755625 + 61009 = 1325^2 + 247^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1816597 and 1816606.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 454157 + ... + 454160.

2^1816634 is an apocalyptic number.

1816634 is a deficient number, since it is larger than the sum of its proper divisors (908320).

1816634 is an equidigital number, since it uses as much as digits as its factorization.

1816634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908319.

The product of its digits is 3456, while the sum is 29.

The square root of 1816634 is about 1347.8256563814. The cubic root of 1816634 is about 122.0176002557.

The spelling of 1816634 in words is "one million, eight hundred sixteen thousand, six hundred thirty-four".