1666252 has 12 divisors (see below), whose sum is σ = 3332560. Its totient is φ = 714096.

The previous prime is 1666237. The next prime is 1666261. The reversal of 1666252 is 2526661.

1666252 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: 59509 = 1666252 / (1 + 6 + 6 + 6 + 2 + 5 + 2).

It is a self number, because there is not a number n which added to its sum of digits gives 1666252.

It is an unprimeable number.

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, 29727 + ... + 29782.

2^1666252 is an apocalyptic number.

It is an amenable number.

1666252 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.

1666252 is a wasteful number, since it uses less digits than its factorization.

1666252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59520 (or 59518 counting only the distinct ones).

The product of its digits is 4320, while the sum is 28.

The square root of 1666252 is about 1290.8338390358. The cubic root of 1666252 is about 118.5532765002.

The spelling of 1666252 in words is "one million, six hundred sixty-six thousand, two hundred fifty-two".