1665122 has 16 divisors (see below), whose sum is σ = 2721600. Its totient is φ = 761040.

The previous prime is 1665121. The next prime is 1665137. The reversal of 1665122 is 2215661.

It is not an unprimeable number, because it can be changed into a prime (1665121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 347 + ... + 1857.

It is an arithmetic number, because the mean of its divisors is an integer number (170100).

2^1665122 is an apocalyptic number.

1665122 is a deficient number, since it is larger than the sum of its proper divisors (1056478).

1665122 is a wasteful number, since it uses less digits than its factorization.

1665122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1561.

The product of its digits is 720, while the sum is 23.

The square root of 1665122 is about 1290.3960632302. The cubic root of 1665122 is about 118.5264707314.

The spelling of 1665122 in words is "one million, six hundred sixty-five thousand, one hundred twenty-two".