31421241 has 6 divisors (see below), whose sum is σ = 45386250. Its totient is φ = 20947488.

The previous prime is 31421233. The next prime is 31421249. The reversal of 31421241 is 14212413.

31421241 is a `hidden beast` number, since 3 + 1 + 421 + 241 = 666.

It is an interprime number because it is at equal distance from previous prime (31421233) and next prime (31421249).

It can be written as a sum of positive squares in only one way, i.e., 27405225 + 4016016 = 5235^2 + 2004^2 .

It is not a de Polignac number, because 31421241 - 2³ = 31421233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31421249) 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 5 ways as a sum of consecutive naturals, for example, 1745616 + ... + 1745633.

It is an arithmetic number, because the mean of its divisors is an integer number (7564375).

Almost surely, 2^31421241 is an apocalyptic number.

It is an amenable number.

31421241 is a deficient number, since it is larger than the sum of its proper divisors (13965009).

31421241 is a wasteful number, since it uses less digits than its factorization.

31421241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3491255 (or 3491252 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 31421241 is about 5605.4652795285. The cubic root of 31421241 is about 315.5545484816.

Adding to 31421241 its reverse (14212413), we get a palindrome (45633654).

The spelling of 31421241 in words is "thirty-one million, four hundred twenty-one thousand, two hundred forty-one".