131041321 has 4 divisors (see below), whose sum is σ = 138749652. Its totient is φ = 123332992.

The previous prime is 131041303. The next prime is 131041349. The reversal of 131041321 is 123140131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123140131 = 131 ⋅940001.

It can be written as a sum of positive squares in 2 ways, for example, as 43824400 + 87216921 = 6620^2 + 9339^2 .

It is a cyclic number.

It is not a de Polignac number, because 131041321 - 2¹¹ = 131039273 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131041295 and 131041304.

It is not an unprimeable number, because it can be changed into a prime (131041381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3854140 + ... + 3854173.

It is an arithmetic number, because the mean of its divisors is an integer number (34687413).

Almost surely, 2^131041321 is an apocalyptic number.

It is an amenable number.

131041321 is a deficient number, since it is larger than the sum of its proper divisors (7708331).

131041321 is an equidigital number, since it uses as much as digits as its factorization.

131041321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7708330.

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

The square root of 131041321 is about 11447.3281162025. The cubic root of 131041321 is about 507.9287014760.

Adding to 131041321 its reverse (123140131), we get a palindrome (254181452).

The spelling of 131041321 in words is "one hundred thirty-one million, forty-one thousand, three hundred twenty-one".