1664930 has 16 divisors (see below), whose sum is σ = 3011904. Its totient is φ = 662640.

The previous prime is 1664909. The next prime is 1664941. The reversal of 1664930 is 394661.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1664893 and 1664902.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3059 + ... + 3561.

It is an arithmetic number, because the mean of its divisors is an integer number (188244).

2^1664930 is an apocalyptic number.

1664930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1664930 is a deficient number, since it is larger than the sum of its proper divisors (1346974).

1664930 is a wasteful number, since it uses less digits than its factorization.

1664930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 1664930 is about 1290.3216653223. The cubic root of 1664930 is about 118.5219149176.

It can be divided in two parts, 16 and 64930, that added together give a palindrome (64946).

The spelling of 1664930 in words is "one million, six hundred sixty-four thousand, nine hundred thirty".