1121643603 has 12 divisors (see below), whose sum is σ = 1627229760. Its totient is φ = 744495696.

The previous prime is 1121643499. The next prime is 1121643623. The reversal of 1121643603 is 3063461211.

1121643603 is a `hidden beast` number, since 1 + 1 + 2 + 16 + 43 + 603 = 666.

1121643603 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1121643603 - 2¹⁴ = 1121627219 is a prime.

It is a super-3 number, since 3×1121643603³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1121643623) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 270051 + ... + 274172.

It is an arithmetic number, because the mean of its divisors is an integer number (135602480).

Almost surely, 2^1121643603 is an apocalyptic number.

1121643603 is a deficient number, since it is larger than the sum of its proper divisors (505586157).

1121643603 is a wasteful number, since it uses less digits than its factorization.

1121643603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544458 (or 544455 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 1121643603 is about 33490.9480755621. The cubic root of 1121643603 is about 1039.0065720091.

The spelling of 1121643603 in words is "one billion, one hundred twenty-one million, six hundred forty-three thousand, six hundred three".