1220610603 has 4 divisors (see below), whose sum is σ = 1627480808. Its totient is φ = 813740400.

The previous prime is 1220610583. The next prime is 1220610607. The reversal of 1220610603 is 3060160221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1220610603 - 2²¹ = 1218513451 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220610603.

It is not an unprimeable number, because it can be changed into a prime (1220610607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203435098 + ... + 203435103.

It is an arithmetic number, because the mean of its divisors is an integer number (406870202).

Almost surely, 2^1220610603 is an apocalyptic number.

1220610603 is a deficient number, since it is larger than the sum of its proper divisors (406870205).

1220610603 is an equidigital number, since it uses as much as digits as its factorization.

1220610603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406870204.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1220610603 is about 34937.2380562631. The cubic root of 1220610603 is about 1068.7079647501.

Adding to 1220610603 its reverse (3060160221), we get a palindrome (4280770824).

The spelling of 1220610603 in words is "one billion, two hundred twenty million, six hundred ten thousand, six hundred three".