1243132263 has 6 divisors (see below), whose sum is σ = 1795635504. Its totient is φ = 828754836.

The previous prime is 1243132249. The next prime is 1243132277. The reversal of 1243132263 is 3622313421.

1243132263 is a `hidden beast` number, since 1 + 2 + 431 + 3 + 226 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (1243132249) and next prime (1243132277).

It is not a de Polignac number, because 1243132263 - 2⁶ = 1243132199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243132223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 69062895 + ... + 69062912.

It is an arithmetic number, because the mean of its divisors is an integer number (299272584).

Almost surely, 2^1243132263 is an apocalyptic number.

1243132263 is a deficient number, since it is larger than the sum of its proper divisors (552503241).

1243132263 is a wasteful number, since it uses less digits than its factorization.

1243132263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138125813 (or 138125810 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 1243132263 is about 35258.0808184450. The cubic root of 1243132263 is about 1075.2409088348.

Adding to 1243132263 its reverse (3622313421), we get a palindrome (4865445684).

The spelling of 1243132263 in words is "one billion, two hundred forty-three million, one hundred thirty-two thousand, two hundred sixty-three".