1042345321 has 4 divisors (see below), whose sum is σ = 1047636612. Its totient is φ = 1037054032.

The previous prime is 1042345313. The next prime is 1042345379. The reversal of 1042345321 is 1235432401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1235432401 = 7 ⋅176490343.

It can be written as a sum of positive squares in 2 ways, for example, as 1026305296 + 16040025 = 32036^2 + 4005^2 .

It is a cyclic number.

It is not a de Polignac number, because 1042345321 - 2³ = 1042345313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1042345921) 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, 2645350 + ... + 2645743.

It is an arithmetic number, because the mean of its divisors is an integer number (261909153).

Almost surely, 2^1042345321 is an apocalyptic number.

It is an amenable number.

1042345321 is a deficient number, since it is larger than the sum of its proper divisors (5291291).

1042345321 is an equidigital number, since it uses as much as digits as its factorization.

1042345321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5291290.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 1042345321 is about 32285.3731742410. The cubic root of 1042345321 is about 1013.9204294837.

Adding to 1042345321 its reverse (1235432401), we get a palindrome (2277777722).

The spelling of 1042345321 in words is "one billion, forty-two million, three hundred forty-five thousand, three hundred twenty-one".