1282021 has 8 divisors (see below), whose sum is σ = 1462104. Its totient is φ = 1113600.

The previous prime is 1282009. The next prime is 1282031. The reversal of 1282021 is 1202821.

It can be written as a sum of positive squares in 4 ways, for example, as 497025 + 784996 = 705^2 + 886^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1282021 - 2¹⁷ = 1150949 is a prime.

It is a Duffinian number.

1282021 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1281986 and 1282004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1282031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2680 + ... + 3121.

It is an arithmetic number, because the mean of its divisors is an integer number (182763).

2^1282021 is an apocalyptic number.

It is an amenable number.

1282021 is a deficient number, since it is larger than the sum of its proper divisors (180083).

1282021 is a wasteful number, since it uses less digits than its factorization.

1282021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5831.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1282021 is about 1132.2636618739. The cubic root of 1282021 is about 108.6338187609.

Adding to 1282021 its reverse (1202821), we get a palindrome (2484842).

The spelling of 1282021 in words is "one million, two hundred eighty-two thousand, twenty-one".