401321015 has 16 divisors (see below), whose sum is σ = 492825600. Its totient is φ = 313591200.

The previous prime is 401320991. The next prime is 401321017. The reversal of 401321015 is 510123104.

It is a de Polignac number, because none of the positive numbers 2^k-401321015 is a prime.

It is a super-2 number, since 2×401321015² = 322117114161260450, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 401320984 and 401321002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401321017) 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 15 ways as a sum of consecutive naturals, for example, 139340 + ... + 142190.

It is an arithmetic number, because the mean of its divisors is an integer number (30801600).

Almost surely, 2^401321015 is an apocalyptic number.

401321015 is a deficient number, since it is larger than the sum of its proper divisors (91504585).

401321015 is a wasteful number, since it uses less digits than its factorization.

401321015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3502.

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

The square root of 401321015 is about 20032.9981530474. The cubic root of 401321015 is about 737.6165186005.

Adding to 401321015 its reverse (510123104), we get a palindrome (911444119).

The spelling of 401321015 in words is "four hundred one million, three hundred twenty-one thousand, fifteen".