1225711603 has 18 divisors (see below), whose sum is σ = 1328429652. Its totient is φ = 1130159520.

The previous prime is 1225711579. The next prime is 1225711621. The reversal of 1225711603 is 3061175221.

It is a happy number.

It is not a de Polignac number, because 1225711603 - 2²¹ = 1223614451 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225711633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4361823 + ... + 4362103.

Almost surely, 2^1225711603 is an apocalyptic number.

1225711603 is a deficient number, since it is larger than the sum of its proper divisors (102718049).

1225711603 is an frugal number, since it uses more digits than its factorization.

1225711603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643 (or 343 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 1225711603 is about 35010.1642812484. The cubic root of 1225711603 is about 1070.1946258481.

Adding to 1225711603 its reverse (3061175221), we get a palindrome (4286886824).

The spelling of 1225711603 in words is "one billion, two hundred twenty-five million, seven hundred eleven thousand, six hundred three".