1288603 has 2 divisors, whose sum is σ = 1288604. Its totient is φ = 1288602.

The previous prime is 1288597. The next prime is 1288607. The reversal of 1288603 is 3068821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1288603 - 2⁵ = 1288571 is a prime.

It is not a weakly prime, because it can be changed into another prime (1288607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 644301 + 644302.

It is an arithmetic number, because the mean of its divisors is an integer number (644302).

2^1288603 is an apocalyptic number.

1288603 is a deficient number, since it is larger than the sum of its proper divisors (1).

1288603 is an equidigital number, since it uses as much as digits as its factorization.

1288603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 1288603 is about 1135.1665076102. The cubic root of 1288603 is about 108.8194131215.

It can be divided in two parts, 1288 and 603, that added together give a triangular number (1891 = T₆₁).

The spelling of 1288603 in words is "one million, two hundred eighty-eight thousand, six hundred three".