1004001065 has 8 divisors (see below), whose sum is σ = 1205048328. Its totient is φ = 803036160.

The previous prime is 1004001043. The next prime is 1004001073. The reversal of 1004001065 is 5601004001.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 390299536 + 613701529 = 19756^2 + 24773^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1004001065 - 2¹⁸ = 1003738921 is a prime.

It is a super-2 number, since 2×1004001065² = 2016036277042268450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10505 + ... + 46025.

It is an arithmetic number, because the mean of its divisors is an integer number (150631041).

Almost surely, 2^1004001065 is an apocalyptic number.

It is an amenable number.

1004001065 is a deficient number, since it is larger than the sum of its proper divisors (201047263).

1004001065 is an equidigital number, since it uses as much as digits as its factorization.

1004001065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41179.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1004001065 is about 31685.9758410562. The cubic root of 1004001065 is about 1001.3319135520.

Adding to 1004001065 its reverse (5601004001), we get a palindrome (6605005066).

The spelling of 1004001065 in words is "one billion, four million, one thousand, sixty-five".