1660245 has 16 divisors (see below), whose sum is σ = 2677632. Its totient is φ = 878400.

The previous prime is 1660231. The next prime is 1660247. The reversal of 1660245 is 5420661.

It is not a de Polignac number, because 1660245 - 2⁴ = 1660229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660247) 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 15 ways as a sum of consecutive naturals, for example, 1899 + ... + 2631.

It is an arithmetic number, because the mean of its divisors is an integer number (167352).

2^1660245 is an apocalyptic number.

1660245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1660245 is a deficient number, since it is larger than the sum of its proper divisors (1017387).

1660245 is a wasteful number, since it uses less digits than its factorization.

1660245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892.

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

The square root of 1660245 is about 1288.5049476040. The cubic root of 1660245 is about 118.4106396042.

The spelling of 1660245 in words is "one million, six hundred sixty thousand, two hundred forty-five".