1154213015243 has 4 divisors (see below), whose sum is σ = 1171440075240. Its totient is φ = 1136985955248.

The previous prime is 1154213015203. The next prime is 1154213015279. The reversal of 1154213015243 is 3425103124511.

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 1154213015243 - 2¹⁴ = 1154212998859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1154213015203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8613529898 + ... + 8613530031.

It is an arithmetic number, because the mean of its divisors is an integer number (292860018810).

Almost surely, 2^{1154213015243} is an apocalyptic number.

1154213015243 is a deficient number, since it is larger than the sum of its proper divisors (17227059997).

1154213015243 is an equidigital number, since it uses as much as digits as its factorization.

1154213015243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17227059996.

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 1154213015243 its reverse (3425103124511), we get a palindrome (4579316139754).

The spelling of 1154213015243 in words is "one trillion, one hundred fifty-four billion, two hundred thirteen million, fifteen thousand, two hundred forty-three".