1665141 has 16 divisors (see below), whose sum is σ = 2365440. Its totient is φ = 1038960.

The previous prime is 1665137. The next prime is 1665143. The reversal of 1665141 is 1415661.

It is not a de Polignac number, because 1665141 - 2² = 1665137 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665143) 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, 7356 + ... + 7578.

It is an arithmetic number, because the mean of its divisors is an integer number (147840).

2^1665141 is an apocalyptic number.

It is an amenable number.

1665141 is a deficient number, since it is larger than the sum of its proper divisors (700299).

1665141 is a wasteful number, since it uses less digits than its factorization.

1665141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376.

The product of its digits is 720, while the sum is 24.

The square root of 1665141 is about 1290.4034252899. The cubic root of 1665141 is about 118.5269215481.

The spelling of 1665141 in words is "one million, six hundred sixty-five thousand, one hundred forty-one".