1243453503 has 16 divisors (see below), whose sum is σ = 1716249600. Its totient is φ = 799851360.

The previous prime is 1243453483. The next prime is 1243453517. The reversal of 1243453503 is 3053543421.

1243453503 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 1243453503 - 2¹² = 1243449407 is a prime.

It is a super-2 number, since 2×1243453503² = 3092353228245942018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243453543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158958 + ... + 166596.

It is an arithmetic number, because the mean of its divisors is an integer number (107265600).

Almost surely, 2^1243453503 is an apocalyptic number.

1243453503 is a deficient number, since it is larger than the sum of its proper divisors (472796097).

1243453503 is a wasteful number, since it uses less digits than its factorization.

1243453503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9542.

The product of its (nonzero) digits is 21600, while the sum is 30.

The square root of 1243453503 is about 35262.6360755971. The cubic root of 1243453503 is about 1075.3335191577. Note that the first 3 decimals are identical.

Adding to 1243453503 its reverse (3053543421), we get a palindrome (4296996924).

The spelling of 1243453503 in words is "one billion, two hundred forty-three million, four hundred fifty-three thousand, five hundred three".