1603601 has 2 divisors, whose sum is σ = 1603602. Its totient is φ = 1603600.

The previous prime is 1603597. The next prime is 1603631. The reversal of 1603601 is 1063061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1048576 + 555025 = 1024^2 + 745^2 .

It is a cyclic number.

It is not a de Polignac number, because 1603601 - 2² = 1603597 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1603601.

It is not a weakly prime, because it can be changed into another prime (1603631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 801800 + 801801.

It is an arithmetic number, because the mean of its divisors is an integer number (801801).

2^1603601 is an apocalyptic number.

It is an amenable number.

1603601 is a deficient number, since it is larger than the sum of its proper divisors (1).

1603601 is an equidigital number, since it uses as much as digits as its factorization.

1603601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1603601 is about 1266.3336843028. Note that the first 3 decimals coincide. The cubic root of 1603601 is about 117.0483886827.

Adding to 1603601 its reverse (1063061), we get a palindrome (2666662).

The spelling of 1603601 in words is "one million, six hundred three thousand, six hundred one".