921020 has 12 divisors (see below), whose sum is σ = 1934184. Its totient is φ = 368400.

The previous prime is 921013. The next prime is 921029. The reversal of 921020 is 20129.

It is a junction number, because it is equal to n+sod(n) for n = 920986 and 921004.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 921020.

It is not an unprimeable number, because it can be changed into a prime (921029) by changing a digit.

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, 23006 + ... + 23045.

It is an arithmetic number, because the mean of its divisors is an integer number (161182).

2⁹²¹⁰²⁰ is an apocalyptic number.

It is an amenable number.

921020 is an abundant number, since it is smaller than the sum of its proper divisors (1013164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

921020 is a wasteful number, since it uses less digits than its factorization.

921020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46060 (or 46058 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 921020 is about 959.6978691234. The cubic root of 921020 is about 97.2948128467.

Adding to 921020 its reverse (20129), we get a palindrome (941149).

The spelling of 921020 in words is "nine hundred twenty-one thousand, twenty".