1391054043 has 4 divisors (see below), whose sum is σ = 1854738728. Its totient is φ = 927369360.

The previous prime is 1391053981. The next prime is 1391054047. The reversal of 1391054043 is 3404501931.

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

It is not a de Polignac number, because 1391054043 - 2¹⁷ = 1390922971 is a prime.

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 1391054043.

It is not an unprimeable number, because it can be changed into a prime (1391054047) 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, 231842338 + ... + 231842343.

It is an arithmetic number, because the mean of its divisors is an integer number (463684682).

Almost surely, 2^1391054043 is an apocalyptic number.

1391054043 is a deficient number, since it is larger than the sum of its proper divisors (463684685).

1391054043 is an equidigital number, since it uses as much as digits as its factorization.

1391054043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463684684.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 1391054043 is about 37296.8369034158. The cubic root of 1391054043 is about 1116.3010526625.

Adding to 1391054043 its reverse (3404501931), we get a palindrome (4795555974).

The spelling of 1391054043 in words is "one billion, three hundred ninety-one million, fifty-four thousand, forty-three".