1243506263 has 8 divisors (see below), whose sum is σ = 1248852528. Its totient is φ = 1238169024.

The previous prime is 1243506223. The next prime is 1243506269. The reversal of 1243506263 is 3626053421.

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 1243506263 - 2¹⁴ = 1243489879 is a prime.

It is a super-2 number, since 2×1243506263² = 3092615652240450338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243506269) 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, 456995 + ... + 459707.

It is an arithmetic number, because the mean of its divisors is an integer number (156106566).

Almost surely, 2^1243506263 is an apocalyptic number.

1243506263 is a deficient number, since it is larger than the sum of its proper divisors (5346265).

1243506263 is a wasteful number, since it uses less digits than its factorization.

1243506263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4513.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 1243506263 is about 35263.3841682842. The cubic root of 1243506263 is about 1075.3487278202.

Adding to 1243506263 its reverse (3626053421), we get a palindrome (4869559684).

The spelling of 1243506263 in words is "one billion, two hundred forty-three million, five hundred six thousand, two hundred sixty-three".