1243153255 has 4 divisors (see below), whose sum is σ = 1491783912. Its totient is φ = 994522600.

The previous prime is 1243153231. The next prime is 1243153267. The reversal of 1243153255 is 5523513421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5523513421 = 709 ⋅7790569.

It is not a de Polignac number, because 1243153255 - 2⁷ = 1243153127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124315321 + ... + 124315330.

It is an arithmetic number, because the mean of its divisors is an integer number (372945978).

Almost surely, 2^1243153255 is an apocalyptic number.

1243153255 is a deficient number, since it is larger than the sum of its proper divisors (248630657).

1243153255 is an equidigital number, since it uses as much as digits as its factorization.

1243153255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248630656.

The product of its digits is 18000, while the sum is 31.

The square root of 1243153255 is about 35258.3785078100. The cubic root of 1243153255 is about 1075.2469611085.

Adding to 1243153255 its reverse (5523513421), we get a palindrome (6766666676).

The spelling of 1243153255 in words is "one billion, two hundred forty-three million, one hundred fifty-three thousand, two hundred fifty-five".