1664194 has 16 divisors (see below), whose sum is σ = 2952000. Its totient is φ = 688464.

The previous prime is 1664123. The next prime is 1664227. The reversal of 1664194 is 4914661.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1644 + ... + 2455.

It is an arithmetic number, because the mean of its divisors is an integer number (184500).

2^1664194 is an apocalyptic number.

1664194 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1664194 is a deficient number, since it is larger than the sum of its proper divisors (1287806).

1664194 is a wasteful number, since it uses less digits than its factorization.

1664194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4137.

The product of its digits is 5184, while the sum is 31.

The square root of 1664194 is about 1290.0364335940. The cubic root of 1664194 is about 118.5044477195.

The spelling of 1664194 in words is "one million, six hundred sixty-four thousand, one hundred ninety-four".