1225603 has 2 divisors, whose sum is σ = 1225604. Its totient is φ = 1225602.

The previous prime is 1225591. The next prime is 1225621. The reversal of 1225603 is 3065221.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (3065221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1225603 - 2⁵ = 1225571 is a prime.

1225603 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1225643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612801 + 612802.

It is an arithmetic number, because the mean of its divisors is an integer number (612802).

2^1225603 is an apocalyptic number.

1225603 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225603 is an equidigital number, since it uses as much as digits as its factorization.

1225603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 1225603 is about 1107.0695551771. The cubic root of 1225603 is about 107.0163017059.

The spelling of 1225603 in words is "one million, two hundred twenty-five thousand, six hundred three".