1043402065 has 4 divisors (see below), whose sum is σ = 1252082484. Its totient is φ = 834721648.

The previous prime is 1043402057. The next prime is 1043402077. The reversal of 1043402065 is 5602043401.

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 285170769 + 758231296 = 16887^2 + 27536^2 .

It is a cyclic number.

It is not a de Polignac number, because 1043402065 - 2³ = 1043402057 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104340202 + ... + 104340211.

It is an arithmetic number, because the mean of its divisors is an integer number (313020621).

Almost surely, 2^1043402065 is an apocalyptic number.

It is an amenable number.

1043402065 is a deficient number, since it is larger than the sum of its proper divisors (208680419).

1043402065 is an equidigital number, since it uses as much as digits as its factorization.

1043402065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208680418.

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

The square root of 1043402065 is about 32301.7347057399. The cubic root of 1043402065 is about 1014.2629559086.

Adding to 1043402065 its reverse (5602043401), we get a palindrome (6645445466).

The spelling of 1043402065 in words is "one billion, forty-three million, four hundred two thousand, sixty-five".