1660544 has 16 divisors (see below), whose sum is σ = 3308370. Its totient is φ = 830208.

The previous prime is 1660517. The next prime is 1660553. The reversal of 1660544 is 4450661.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1658944 + 1600 = 1288^2 + 40^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6359 + ... + 6614.

2^1660544 is an apocalyptic number.

It is an amenable number.

1660544 is a deficient number, since it is larger than the sum of its proper divisors (1647826).

1660544 is an equidigital number, since it uses as much as digits as its factorization.

1660544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12987 (or 12975 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 1660544 is about 1288.6209683223. The cubic root of 1660544 is about 118.4177475222.

The spelling of 1660544 in words is "one million, six hundred sixty thousand, five hundred forty-four".