1660542 has 32 divisors (see below), whose sum is σ = 3645600. Its totient is φ = 501120.

The previous prime is 1660517. The next prime is 1660553. The reversal of 1660542 is 2450661.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4584 + ... + 4932.

It is an arithmetic number, because the mean of its divisors is an integer number (113925).

2^1660542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1660542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1822800).

1660542 is an abundant number, since it is smaller than the sum of its proper divisors (1985058).

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

1660542 is a wasteful number, since it uses less digits than its factorization.

1660542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1660542 is about 1288.6201922987. The cubic root of 1660542 is about 118.4176999805.

The spelling of 1660542 in words is "one million, six hundred sixty thousand, five hundred forty-two".