1301603 has 2 divisors, whose sum is σ = 1301604. Its totient is φ = 1301602.

The previous prime is 1301591. The next prime is 1301617. The reversal of 1301603 is 3061031.

It is an a-pointer prime, because the next prime (1301617) can be obtained adding 1301603 to its sum of digits (14).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1301603 - 2⁶ = 1301539 is a prime.

It is not a weakly prime, because it can be changed into another prime (1301693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 650801 + 650802.

It is an arithmetic number, because the mean of its divisors is an integer number (650802).

2^1301603 is an apocalyptic number.

1301603 is a deficient number, since it is larger than the sum of its proper divisors (1).

1301603 is an equidigital number, since it uses as much as digits as its factorization.

1301603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 1301603 is about 1140.8781705336. The cubic root of 1301603 is about 109.1841289265.

Adding to 1301603 its reverse (3061031), we get a palindrome (4362634).

The spelling of 1301603 in words is "one million, three hundred one thousand, six hundred three".