1200665 has 8 divisors (see below), whose sum is σ = 1446720. Its totient is φ = 956592.

The previous prime is 1200643. The next prime is 1200673. The reversal of 1200665 is 5660021.

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 1200665 - 2¹⁶ = 1135129 is a prime.

It is a plaindrome in base 14.

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, 1922 + ... + 2468.

It is an arithmetic number, because the mean of its divisors is an integer number (180840).

2^1200665 is an apocalyptic number.

It is an amenable number.

1200665 is a deficient number, since it is larger than the sum of its proper divisors (246055).

1200665 is an equidigital number, since it uses as much as digits as its factorization.

1200665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1200665 is about 1095.7486025544. The cubic root of 1200665 is about 106.2854829586.

Adding to 1200665 its reverse (5660021), we get a palindrome (6860686).

The spelling of 1200665 in words is "one million, two hundred thousand, six hundred sixty-five".