1243131253 has 8 divisors (see below), whose sum is σ = 1530007808. Its totient is φ = 983576304.

The previous prime is 1243131203. The next prime is 1243131257. The reversal of 1243131253 is 3521313421.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1243131253 - 2²¹ = 1241034101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243131257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6830301 + ... + 6830482.

It is an arithmetic number, because the mean of its divisors is an integer number (191250976).

Almost surely, 2^1243131253 is an apocalyptic number.

1243131253 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1243131253 is a deficient number, since it is larger than the sum of its proper divisors (286876555).

1243131253 is a wasteful number, since it uses less digits than its factorization.

1243131253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13660803.

The product of its digits is 2160, while the sum is 25.

The square root of 1243131253 is about 35258.0664954844. The cubic root of 1243131253 is about 1075.2406176366.

Adding to 1243131253 its reverse (3521313421), we get a palindrome (4764444674).

It can be divided in two parts, 1243 and 131253, that added together give a square (132496 = 364²).

The spelling of 1243131253 in words is "one billion, two hundred forty-three million, one hundred thirty-one thousand, two hundred fifty-three".