1664294 has 8 divisors (see below), whose sum is σ = 2501928. Its totient is φ = 830320.

The previous prime is 1664291. The next prime is 1664353. The reversal of 1664294 is 4924661.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1664294.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1229 + ... + 2199.

It is an arithmetic number, because the mean of its divisors is an integer number (312741).

2^1664294 is an apocalyptic number.

1664294 is a deficient number, since it is larger than the sum of its proper divisors (837634).

1664294 is an equidigital number, since it uses as much as digits as its factorization.

1664294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1830.

The product of its digits is 10368, while the sum is 32.

The square root of 1664294 is about 1290.0751916071. The cubic root of 1664294 is about 118.5068212824.

The spelling of 1664294 in words is "one million, six hundred sixty-four thousand, two hundred ninety-four".