1283021 has 2 divisors, whose sum is σ = 1283022. Its totient is φ = 1283020.

The previous prime is 1283017. The next prime is 1283027. The reversal of 1283021 is 1203821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1240996 + 42025 = 1114^2 + 205^2 .

It is a cyclic number.

It is not a de Polignac number, because 1283021 - 2² = 1283017 is a prime.

It is a super-2 number, since 2×1283021² = 3292285772882, which contains 22 as substring.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1283027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 641510 + 641511.

It is an arithmetic number, because the mean of its divisors is an integer number (641511).

2^1283021 is an apocalyptic number.

It is an amenable number.

1283021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1283021 is an equidigital number, since it uses as much as digits as its factorization.

1283021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1283021 is about 1132.7051690533. The cubic root of 1283021 is about 108.6620568802.

Adding to 1283021 its reverse (1203821), we get a palindrome (2486842).

The spelling of 1283021 in words is "one million, two hundred eighty-three thousand, twenty-one".