1283509 has 2 divisors, whose sum is σ = 1283510. Its totient is φ = 1283508.

The previous prime is 1283479. The next prime is 1283521. The reversal of 1283509 is 9053821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 864900 + 418609 = 930^2 + 647^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1283509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1283539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 641754 + 641755.

It is an arithmetic number, because the mean of its divisors is an integer number (641755).

2^1283509 is an apocalyptic number.

It is an amenable number.

1283509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1283509 is an equidigital number, since it uses as much as digits as its factorization.

1283509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1283509 is about 1132.9205620872. The cubic root of 1283509 is about 108.6758317553.

It can be divided in two parts, 12 and 83509, that added together give a 4-th power (83521 = 17⁴).

The spelling of 1283509 in words is "one million, two hundred eighty-three thousand, five hundred nine".