1261114543 has 8 divisors (see below), whose sum is σ = 1358399168. Its totient is φ = 1163869344.

The previous prime is 1261114523. The next prime is 1261114559. The reversal of 1261114543 is 3454111621.

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 1261114543 - 2¹³ = 1261106351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261114513) 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, 121546 + ... + 131512.

It is an arithmetic number, because the mean of its divisors is an integer number (169799896).

Almost surely, 2^1261114543 is an apocalyptic number.

1261114543 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1261114543 is a deficient number, since it is larger than the sum of its proper divisors (97284625).

1261114543 is an equidigital number, since it uses as much as digits as its factorization.

1261114543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19713.

The product of its digits is 2880, while the sum is 28.

The square root of 1261114543 is about 35512.1745743625. The cubic root of 1261114543 is about 1080.4006695241.

The spelling of 1261114543 in words is "one billion, two hundred sixty-one million, one hundred fourteen thousand, five hundred forty-three".