1243111255 has 8 divisors (see below), whose sum is σ = 1492304400. Its totient is φ = 994108416.

The previous prime is 1243111249. The next prime is 1243111273. The reversal of 1243111255 is 5521113421.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1243111255 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32785 + ... + 59674.

It is an arithmetic number, because the mean of its divisors is an integer number (186538050).

Almost surely, 2^1243111255 is an apocalyptic number.

1243111255 is a deficient number, since it is larger than the sum of its proper divisors (249193145).

1243111255 is an equidigital number, since it uses as much as digits as its factorization.

1243111255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95153.

The product of its digits is 1200, while the sum is 25.

The square root of 1243111255 is about 35257.7828996663. The cubic root of 1243111255 is about 1075.2348518798.

Adding to 1243111255 its reverse (5521113421), we get a palindrome (6764224676).

The spelling of 1243111255 in words is "one billion, two hundred forty-three million, one hundred eleven thousand, two hundred fifty-five".