1243112403 has 48 divisors (see below), whose sum is σ = 1932862176. Its totient is φ = 706068480.

The previous prime is 1243112399. The next prime is 1243112417. The reversal of 1243112403 is 3042113421.

It is not a de Polignac number, because 1243112403 - 2² = 1243112399 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1243112403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243112443) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 596323 + ... + 598403.

It is an arithmetic number, because the mean of its divisors is an integer number (40267962).

Almost surely, 2^1243112403 is an apocalyptic number.

1243112403 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1243112403 is a deficient number, since it is larger than the sum of its proper divisors (689749773).

1243112403 is a wasteful number, since it uses less digits than its factorization.

1243112403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2184 (or 2167 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1243112403 is about 35257.7991797560. The cubic root of 1243112403 is about 1075.2351828690.

Adding to 1243112403 its reverse (3042113421), we get a palindrome (4285225824).

The spelling of 1243112403 in words is "one billion, two hundred forty-three million, one hundred twelve thousand, four hundred three".