1601866 has 8 divisors (see below), whose sum is σ = 2746080. Its totient is φ = 686508.

The previous prime is 1601861. The next prime is 1601867. The reversal of 1601866 is 6681061.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is a zygodrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (1601861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57196 + ... + 57223.

It is an arithmetic number, because the mean of its divisors is an integer number (343260).

2^1601866 is an apocalyptic number.

1601866 is a deficient number, since it is larger than the sum of its proper divisors (1144214).

1601866 is a wasteful number, since it uses less digits than its factorization.

1601866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114428.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1601866 is about 1265.6484504000. The cubic root of 1601866 is about 117.0061603399.

The spelling of 1601866 in words is "one million, six hundred one thousand, eight hundred sixty-six".