1283521 has 2 divisors, whose sum is σ = 1283522. Its totient is φ = 1283520.

The previous prime is 1283509. The next prime is 1283537. The reversal of 1283521 is 1253821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 923521 + 360000 = 961^2 + 600^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1283521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1283492 and 1283501.

It is not a weakly prime, because it can be changed into another prime (1283591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 641760 + 641761.

It is an arithmetic number, because the mean of its divisors is an integer number (641761).

2^1283521 is an apocalyptic number.

It is an amenable number.

1283521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1283521 is an equidigital number, since it uses as much as digits as its factorization.

1283521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 480, while the sum is 22.

The square root of 1283521 is about 1132.9258581214. The cubic root of 1283521 is about 108.6761704377.

The spelling of 1283521 in words is "one million, two hundred eighty-three thousand, five hundred twenty-one".