1664412 has 24 divisors (see below), whose sum is σ = 3958416. Its totient is φ = 544128.

The previous prime is 1664407. The next prime is 1664417. The reversal of 1664412 is 2144661.

It is an interprime number because it is at equal distance from previous prime (1664407) and next prime (1664417).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664417) by changing a digit.

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, 673 + ... + 1944.

It is an arithmetic number, because the mean of its divisors is an integer number (164934).

2^1664412 is an apocalyptic number.

1664412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1664412 is an abundant number, since it is smaller than the sum of its proper divisors (2294004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1664412 is a wasteful number, since it uses less digits than its factorization.

1664412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2677 (or 2675 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

The square root of 1664412 is about 1290.1209245648. The cubic root of 1664412 is about 118.5096219643.

Subtracting 1664412 from its reverse (2144661), we obtain a square (480249 = 693²).

The spelling of 1664412 in words is "one million, six hundred sixty-four thousand, four hundred twelve".