1668734 has 4 divisors (see below), whose sum is σ = 2503104. Its totient is φ = 834366.

The previous prime is 1668727. The next prime is 1668739. The reversal of 1668734 is 4378661.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1668694 and 1668703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 417182 + ... + 417185.

It is an arithmetic number, because the mean of its divisors is an integer number (625776).

2^1668734 is an apocalyptic number.

1668734 is a deficient number, since it is larger than the sum of its proper divisors (834370).

1668734 is an equidigital number, since it uses as much as digits as its factorization.

1668734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834369.

The product of its digits is 24192, while the sum is 35.

The square root of 1668734 is about 1291.7948753575. The cubic root of 1668734 is about 118.6121117886.

The spelling of 1668734 in words is "one million, six hundred sixty-eight thousand, seven hundred thirty-four".