1020312043 has 4 divisors (see below), whose sum is σ = 1022144400. Its totient is φ = 1018479688.

The previous prime is 1020311987. The next prime is 1020312061. The reversal of 1020312043 is 3402130201.

It is a happy number.

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 1020312043 - 2⁹ = 1020311531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020312743) 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, 915343 + ... + 916456.

It is an arithmetic number, because the mean of its divisors is an integer number (255536100).

Almost surely, 2^1020312043 is an apocalyptic number.

1020312043 is a deficient number, since it is larger than the sum of its proper divisors (1832357).

1020312043 is an equidigital number, since it uses as much as digits as its factorization.

1020312043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1832356.

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

The square root of 1020312043 is about 31942.3236944340. The cubic root of 1020312043 is about 1006.7253492805.

Adding to 1020312043 its reverse (3402130201), we get a palindrome (4422442244).

The spelling of 1020312043 in words is "one billion, twenty million, three hundred twelve thousand, forty-three".