1243203153 has 16 divisors (see below), whose sum is σ = 1730826240. Its totient is φ = 792239184.

The previous prime is 1243203109. The next prime is 1243203173. The reversal of 1243203153 is 3513023421.

It is not a de Polignac number, because 1243203153 - 2⁸ = 1243202897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1243203103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116250 + ... + 126492.

It is an arithmetic number, because the mean of its divisors is an integer number (108176640).

Almost surely, 2^1243203153 is an apocalyptic number.

It is an amenable number.

1243203153 is a deficient number, since it is larger than the sum of its proper divisors (487623087).

1243203153 is a wasteful number, since it uses less digits than its factorization.

1243203153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12028.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 1243203153 is about 35259.0861055700. The cubic root of 1243203153 is about 1075.2613470942.

Adding to 1243203153 its reverse (3513023421), we get a palindrome (4756226574).

The spelling of 1243203153 in words is "one billion, two hundred forty-three million, two hundred three thousand, one hundred fifty-three".