31241 has 4 divisors (see below), whose sum is σ = 35712. Its totient is φ = 26772.

The previous prime is 31237. The next prime is 31247. The reversal of 31241 is 14213.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 14213 = 61 ⋅233.

It is a cyclic number.

It is not a de Polignac number, because 31241 - 2² = 31237 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2225 + ... + 2238.

It is an arithmetic number, because the mean of its divisors is an integer number (8928).

2³¹²⁴¹ is an apocalyptic number.

It is an amenable number.

31241 is a deficient number, since it is larger than the sum of its proper divisors (4471).

31241 is an equidigital number, since it uses as much as digits as its factorization.

31241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4470.

The product of its digits is 24, while the sum is 11.

The square root of 31241 is about 176.7512376194. The cubic root of 31241 is about 31.4950021465.

Adding to 31241 its reverse (14213), we get a palindrome (45454).

It can be divided in two parts, 3124 and 1, that added together give a 5-th power (3125 = 5⁵).

The spelling of 31241 in words is "thirty-one thousand, two hundred forty-one".