1603361 has 2 divisors, whose sum is σ = 1603362. Its totient is φ = 1603360.

The previous prime is 1603339. The next prime is 1603363. The reversal of 1603361 is 1633061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1600225 + 3136 = 1265^2 + 56^2 .

It is a cyclic number.

It is not a de Polignac number, because 1603361 - 2⁶ = 1603297 is a prime.

Together with 1603363, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1603363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 801680 + 801681.

It is an arithmetic number, because the mean of its divisors is an integer number (801681).

2^1603361 is an apocalyptic number.

It is an amenable number.

1603361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1603361 is an equidigital number, since it uses as much as digits as its factorization.

1603361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 1603361 is about 1266.2389190038. The cubic root of 1603361 is about 117.0425491140.

The spelling of 1603361 in words is "one million, six hundred three thousand, three hundred sixty-one".