401131321 has 4 divisors (see below), whose sum is σ = 401206912. Its totient is φ = 401055732.

The previous prime is 401131309. The next prime is 401131333. The reversal of 401131321 is 123131104.

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 an interprime number because it is at equal distance from previous prime (401131309) and next prime (401131333).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401131321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 401131295 and 401131304.

It is not an unprimeable number, because it can be changed into a prime (401131361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29181 + ... + 40666.

It is an arithmetic number, because the mean of its divisors is an integer number (100301728).

Almost surely, 2^401131321 is an apocalyptic number.

It is an amenable number.

401131321 is a deficient number, since it is larger than the sum of its proper divisors (75591).

401131321 is an equidigital number, since it uses as much as digits as its factorization.

401131321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75590.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 401131321 is about 20028.2630549931. The cubic root of 401131321 is about 737.5002829071.

Adding to 401131321 its reverse (123131104), we get a palindrome (524262425).

The spelling of 401131321 in words is "four hundred one million, one hundred thirty-one thousand, three hundred twenty-one".