1021964 has 12 divisors (see below), whose sum is σ = 1797600. Its totient is φ = 508368.

The previous prime is 1021963. The next prime is 1021973. The reversal of 1021964 is 4691201.

It is a happy number.

It is a zygodrome in base 2.

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 3 ways as a sum of consecutive naturals, for example, 422 + ... + 1490.

It is an arithmetic number, because the mean of its divisors is an integer number (149800).

2^1021964 is an apocalyptic number.

It is an amenable number.

1021964 is a deficient number, since it is larger than the sum of its proper divisors (775636).

1021964 is a wasteful number, since it uses less digits than its factorization.

1021964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1312 (or 1310 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1021964 is about 1010.9223511230. The cubic root of 1021964 is about 100.7268376049.

The spelling of 1021964 in words is "one million, twenty-one thousand, nine hundred sixty-four".