1665244 has 12 divisors (see below), whose sum is σ = 3330544. Its totient is φ = 713664.

The previous prime is 1665233. The next prime is 1665247. The reversal of 1665244 is 4425661.

1665244 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 59473 = 1665244 / (1 + 6 + 6 + 5 + 2 + 4 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665247) 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 3 ways as a sum of consecutive naturals, for example, 29709 + ... + 29764.

2^1665244 is an apocalyptic number.

1665244 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1665244 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1665244 is a wasteful number, since it uses less digits than its factorization.

1665244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59484 (or 59482 counting only the distinct ones).

The product of its digits is 5760, while the sum is 28.

The square root of 1665244 is about 1290.4433346722. The cubic root of 1665244 is about 118.5293653894.

The spelling of 1665244 in words is "one million, six hundred sixty-five thousand, two hundred forty-four".