1660115 has 8 divisors (see below), whose sum is σ = 2025168. Its totient is φ = 1306080.

The previous prime is 1660111. The next prime is 1660121. The reversal of 1660115 is 5110661.

It is a happy number.

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

It is not a de Polignac number, because 1660115 - 2² = 1660111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660111) 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 7 ways as a sum of consecutive naturals, for example, 2417 + ... + 3026.

It is an arithmetic number, because the mean of its divisors is an integer number (253146).

2^1660115 is an apocalyptic number.

1660115 is a deficient number, since it is larger than the sum of its proper divisors (365053).

1660115 is an equidigital number, since it uses as much as digits as its factorization.

1660115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5509.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 1660115 is about 1288.4545005548. The cubic root of 1660115 is about 118.4075489389.

Adding to 1660115 its reverse (5110661), we get a palindrome (6770776).

The spelling of 1660115 in words is "one million, six hundred sixty thousand, one hundred fifteen".