1021960 has 32 divisors (see below), whose sum is σ = 2381400. Its totient is φ = 394240.

The previous prime is 1021919. The next prime is 1021961. The reversal of 1021960 is 691201.

It can be written as a sum of positive squares in 4 ways, for example, as 669124 + 352836 = 818^2 + 594^2 .

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 7 ways as a sum of consecutive naturals, for example, 720 + ... + 1600.

2^1021960 is an apocalyptic number.

1021960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1190700).

1021960 is an abundant number, since it is smaller than the sum of its proper divisors (1359440).

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

1021960 is a wasteful number, since it uses less digits than its factorization.

1021960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 921 (or 917 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 1021960 is about 1010.9203727297. The cubic root of 1021960 is about 100.7267061887.

The spelling of 1021960 in words is "one million, twenty-one thousand, nine hundred sixty".