964821 has 24 divisors (see below), whose sum is σ = 1528416. Its totient is φ = 536640.

The previous prime is 964793. The next prime is 964823. The reversal of 964821 is 128469.

It is not a de Polignac number, because 964821 - 2⁶ = 964757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (964823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5491 + ... + 5663.

It is an arithmetic number, because the mean of its divisors is an integer number (63684).

2⁹⁶⁴⁸²¹ is an apocalyptic number.

It is an amenable number.

964821 is a deficient number, since it is larger than the sum of its proper divisors (563595).

964821 is a wasteful number, since it uses less digits than its factorization.

964821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213 (or 200 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 964821 is about 982.2530223929. The cubic root of 964821 is about 98.8133407655.

It can be divided in two parts, 9648 and 21, that added together give a palindrome (9669).

The spelling of 964821 in words is "nine hundred sixty-four thousand, eight hundred twenty-one".