1312000043 has 4 divisors (see below), whose sum is σ = 1322330880. Its totient is φ = 1301669208.

The previous prime is 1312000033. The next prime is 1312000061. The reversal of 1312000043 is 3400002131.

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 1312000043 - 2⁶ = 1311999979 is a prime.

It is a super-2 number, since 2×1312000043² = 3442688225664003698, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1311999991 and 1312000027.

It is not an unprimeable number, because it can be changed into a prime (1312000003) 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, 5165228 + ... + 5165481.

It is an arithmetic number, because the mean of its divisors is an integer number (330582720).

Almost surely, 2^1312000043 is an apocalyptic number.

1312000043 is a deficient number, since it is larger than the sum of its proper divisors (10330837).

1312000043 is a wasteful number, since it uses less digits than its factorization.

1312000043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10330836.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1312000043 is about 36221.5411461191. The cubic root of 1312000043 is about 1094.7407469195.

Adding to 1312000043 its reverse (3400002131), we get a palindrome (4712002174).

The spelling of 1312000043 in words is "one billion, three hundred twelve million, forty-three", and thus it is an aban number.