1043012321 has 4 divisors (see below), whose sum is σ = 1123244052. Its totient is φ = 962780592.

The previous prime is 1043012309. The next prime is 1043012323. The reversal of 1043012321 is 1232103401.

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

It can be written as a sum of positive squares in 2 ways, for example, as 591024721 + 451987600 = 24311^2 + 21260^2 .

It is a cyclic number.

It is not a de Polignac number, because 1043012321 - 2²⁶ = 975903457 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 1043012321.

It is not an unprimeable number, because it can be changed into a prime (1043012323) 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, 40115846 + ... + 40115871.

It is an arithmetic number, because the mean of its divisors is an integer number (280811013).

Almost surely, 2^1043012321 is an apocalyptic number.

It is an amenable number.

1043012321 is a deficient number, since it is larger than the sum of its proper divisors (80231731).

1043012321 is an equidigital number, since it uses as much as digits as its factorization.

1043012321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80231730.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1043012321 is about 32295.7012774146. The cubic root of 1043012321 is about 1014.1366536440.

Adding to 1043012321 its reverse (1232103401), we get a palindrome (2275115722).

The spelling of 1043012321 in words is "one billion, forty-three million, twelve thousand, three hundred twenty-one".