1664562 has 8 divisors (see below), whose sum is σ = 3329136. Its totient is φ = 554852.

The previous prime is 1664561. The next prime is 1664563. The reversal of 1664562 is 2654661.

It is an interprime number because it is at equal distance from previous prime (1664561) and next prime (1664563).

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

1664562 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1664561) 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, 138708 + ... + 138719.

It is an arithmetic number, because the mean of its divisors is an integer number (416142).

2^1664562 is an apocalyptic number.

1664562 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1664562 is a wasteful number, since it uses less digits than its factorization.

1664562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277432.

The product of its digits is 8640, while the sum is 30.

The square root of 1664562 is about 1290.1790573405. The cubic root of 1664562 is about 118.5131819622.

Subtracting 1664562 from its reverse (2654661), we obtain a palindrome (990099).

The spelling of 1664562 in words is "one million, six hundred sixty-four thousand, five hundred sixty-two".