1310400043 has 4 divisors (see below), whose sum is σ = 1314176760. Its totient is φ = 1306623328.

The previous prime is 1310400011. The next prime is 1310400079. The reversal of 1310400043 is 3400040131.

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 1310400043 - 2⁵ = 1310400011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1310400083) 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, 1887838 + ... + 1888531.

It is an arithmetic number, because the mean of its divisors is an integer number (328544190).

Almost surely, 2^1310400043 is an apocalyptic number.

1310400043 is a deficient number, since it is larger than the sum of its proper divisors (3776717).

1310400043 is an equidigital number, since it uses as much as digits as its factorization.

1310400043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3776716.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1310400043 is about 36199.4481035278. The cubic root of 1310400043 is about 1094.2955493466.

Adding to 1310400043 its reverse (3400040131), we get a palindrome (4710440174).

The spelling of 1310400043 in words is "one billion, three hundred ten million, four hundred thousand, forty-three".