1065843121 has 4 divisors (see below), whose sum is σ = 1218106432. Its totient is φ = 913579812.

The previous prime is 1065843109. The next prime is 1065843151. The reversal of 1065843121 is 1213485601.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1065843121 - 2¹⁹ = 1065318833 is a prime.

It is a super-2 number, since 2×1065843121² = 2272043117166041282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1065843151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76131645 + ... + 76131658.

It is an arithmetic number, because the mean of its divisors is an integer number (304526608).

Almost surely, 2^1065843121 is an apocalyptic number.

It is an amenable number.

1065843121 is a deficient number, since it is larger than the sum of its proper divisors (152263311).

1065843121 is an equidigital number, since it uses as much as digits as its factorization.

1065843121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152263310.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 1065843121 is about 32647.2528859627. The cubic root of 1065843121 is about 1021.4828876504.

The spelling of 1065843121 in words is "one billion, sixty-five million, eight hundred forty-three thousand, one hundred twenty-one".