1021966 has 24 divisors (see below), whose sum is σ = 1742832. Its totient is φ = 448800.

The previous prime is 1021963. The next prime is 1021973. The reversal of 1021966 is 6691201.

1021966 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1021966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021961) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9871 + ... + 9973.

It is an arithmetic number, because the mean of its divisors is an integer number (72618).

2^1021966 is an apocalyptic number.

1021966 is a deficient number, since it is larger than the sum of its proper divisors (720866).

1021966 is a wasteful number, since it uses less digits than its factorization.

1021966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 157 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 1021966 is about 1010.9233403181. The cubic root of 1021966 is about 100.7269033128.

The spelling of 1021966 in words is "one million, twenty-one thousand, nine hundred sixty-six".