1378042543 has 8 divisors (see below), whose sum is σ = 1410594768. Its totient is φ = 1345513344.

The previous prime is 1378042529. The next prime is 1378042553. The reversal of 1378042543 is 3452408731.

It is a happy number.

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

It is not a de Polignac number, because 1378042543 - 2⁹ = 1378042031 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 (1378042553) 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, 203805 + ... + 210457.

It is an arithmetic number, because the mean of its divisors is an integer number (176324346).

Almost surely, 2^1378042543 is an apocalyptic number.

1378042543 is a deficient number, since it is larger than the sum of its proper divisors (32552225).

1378042543 is an equidigital number, since it uses as much as digits as its factorization.

1378042543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11513.

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 1378042543 is about 37121.9954070360. The cubic root of 1378042543 is about 1112.8096295593.

The spelling of 1378042543 in words is "one billion, three hundred seventy-eight million, forty-two thousand, five hundred forty-three".