1283603 has 2 divisors, whose sum is σ = 1283604. Its totient is φ = 1283602.

The previous prime is 1283591. The next prime is 1283677. The reversal of 1283603 is 3063821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1283603 - 2⁶ = 1283539 is a prime.

It is a Chen prime.

It is a plaindrome in base 14.

It is not a weakly prime, because it can be changed into another prime (1283683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 641801 + 641802.

It is an arithmetic number, because the mean of its divisors is an integer number (641802).

2^1283603 is an apocalyptic number.

1283603 is a deficient number, since it is larger than the sum of its proper divisors (1).

1283603 is an equidigital number, since it uses as much as digits as its factorization.

1283603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1283603 is about 1132.9620470254. The cubic root of 1283603 is about 108.6784847113.

It can be divided in two parts, 12 and 83603, that multiplied together give a triangular number (1003236 = T₁₄₁₆).

The spelling of 1283603 in words is "one million, two hundred eighty-three thousand, six hundred three".