1243503253 has 8 divisors (see below), whose sum is σ = 1246976640. Its totient is φ = 1240036320.

The previous prime is 1243503251. The next prime is 1243503259. The reversal of 1243503253 is 3523053421.

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 1243503253 - 2¹ = 1243503251 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243503251) 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, 1133001 + ... + 1134097.

It is an arithmetic number, because the mean of its divisors is an integer number (155872080).

Almost surely, 2^1243503253 is an apocalyptic number.

It is an amenable number.

1243503253 is a deficient number, since it is larger than the sum of its proper divisors (3473387).

1243503253 is a wasteful number, since it uses less digits than its factorization.

1243503253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3227.

The product of its (nonzero) digits is 10800, while the sum is 28.

The square root of 1243503253 is about 35263.3414894278. The cubic root of 1243503253 is about 1075.3478601655.

Adding to 1243503253 its reverse (3523053421), we get a palindrome (4766556674).

The spelling of 1243503253 in words is "one billion, two hundred forty-three million, five hundred three thousand, two hundred fifty-three".