1255435432243 has 4 divisors (see below), whose sum is σ = 1255502275720. Its totient is φ = 1255368588768.

The previous prime is 1255435432219. The next prime is 1255435432253. The reversal of 1255435432243 is 3422345345521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1255435432243 - 2⁵ = 1255435432211 is a prime.

It is a super-2 number, since 2×1255435432243² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1255435432243.

It is not an unprimeable number, because it can be changed into a prime (1255435432213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33393558 + ... + 33431131.

It is an arithmetic number, because the mean of its divisors is an integer number (313875568930).

Almost surely, 2^{1255435432243} is an apocalyptic number.

1255435432243 is a deficient number, since it is larger than the sum of its proper divisors (66843477).

1255435432243 is an equidigital number, since it uses as much as digits as its factorization.

1255435432243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66843476.

The product of its digits is 1728000, while the sum is 43.

The spelling of 1255435432243 in words is "one trillion, two hundred fifty-five billion, four hundred thirty-five million, four hundred thirty-two thousand, two hundred forty-three".