401320065 has 32 divisors (see below), whose sum is σ = 658938240. Its totient is φ = 208495616.

The previous prime is 401320063. The next prime is 401320069. The reversal of 401320065 is 560023104.

It is a happy number.

It is not a de Polignac number, because 401320065 - 2¹ = 401320063 is a prime.

It is a super-2 number, since 2×401320065² = 322115589143208450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401320063) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 97999 + ... + 102011.

It is an arithmetic number, because the mean of its divisors is an integer number (20591820).

Almost surely, 2^401320065 is an apocalyptic number.

It is an amenable number.

401320065 is a deficient number, since it is larger than the sum of its proper divisors (257618175).

401320065 is a wasteful number, since it uses less digits than its factorization.

401320065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4193.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 401320065 is about 20032.9744421541. The cubic root of 401320065 is about 737.6159365758.

Adding to 401320065 its reverse (560023104), we get a palindrome (961343169).

The spelling of 401320065 in words is "four hundred one million, three hundred twenty thousand, sixty-five".