1664246 has 4 divisors (see below), whose sum is σ = 2496372. Its totient is φ = 832122.

The previous prime is 1664227. The next prime is 1664251. The reversal of 1664246 is 6424661.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 416060 + ... + 416063.

It is an arithmetic number, because the mean of its divisors is an integer number (624093).

2^1664246 is an apocalyptic number.

1664246 is a deficient number, since it is larger than the sum of its proper divisors (832126).

1664246 is an equidigital number, since it uses as much as digits as its factorization.

1664246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832125.

The product of its digits is 6912, while the sum is 29.

The square root of 1664246 is about 1290.0565879061. The cubic root of 1664246 is about 118.5056819841.

The spelling of 1664246 in words is "one million, six hundred sixty-four thousand, two hundred forty-six".