1812634 has 4 divisors (see below), whose sum is σ = 2718954. Its totient is φ = 906316.

The previous prime is 1812623. The next prime is 1812661. The reversal of 1812634 is 4362181.

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., 1315609 + 497025 = 1147^2 + 705^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1812599 and 1812608.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 453157 + ... + 453160.

2^1812634 is an apocalyptic number.

1812634 is a deficient number, since it is larger than the sum of its proper divisors (906320).

1812634 is an equidigital number, since it uses as much as digits as its factorization.

1812634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906319.

The product of its digits is 1152, while the sum is 25.

The square root of 1812634 is about 1346.3409672145. The cubic root of 1812634 is about 121.9279786326.

The spelling of 1812634 in words is "one million, eight hundred twelve thousand, six hundred thirty-four".