1664282 has 4 divisors (see below), whose sum is σ = 2496426. Its totient is φ = 832140.

The previous prime is 1664279. The next prime is 1664287. The reversal of 1664282 is 2824661.

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., 1615441 + 48841 = 1271^2 + 221^2 .

It is not an unprimeable number, because it can be changed into a prime (1664287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 416069 + ... + 416072.

2^1664282 is an apocalyptic number.

1664282 is a deficient number, since it is larger than the sum of its proper divisors (832144).

1664282 is an equidigital number, since it uses as much as digits as its factorization.

1664282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832143.

The product of its digits is 4608, while the sum is 29.

The square root of 1664282 is about 1290.0705407070. The cubic root of 1664282 is about 118.5065364599.

The spelling of 1664282 in words is "one million, six hundred sixty-four thousand, two hundred eighty-two".