1664485 has 8 divisors (see below), whose sum is σ = 2004480. Its totient is φ = 1326864.

The previous prime is 1664461. The next prime is 1664501. The reversal of 1664485 is 5844661.

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

It is a cyclic number.

It is not a de Polignac number, because 1664485 - 2⁹ = 1663973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1664485.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1956 + ... + 2674.

It is an arithmetic number, because the mean of its divisors is an integer number (250560).

2^1664485 is an apocalyptic number.

It is an amenable number.

1664485 is a deficient number, since it is larger than the sum of its proper divisors (339995).

1664485 is an equidigital number, since it uses as much as digits as its factorization.

1664485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1187.

The product of its digits is 23040, while the sum is 34.

The square root of 1664485 is about 1290.1492161762. The cubic root of 1664485 is about 118.5113545233.

The spelling of 1664485 in words is "one million, six hundred sixty-four thousand, four hundred eighty-five".