7813241 has 2 divisors, whose sum is σ = 7813242. Its totient is φ = 7813240.

The previous prime is 7813213. The next prime is 7813243. The reversal of 7813241 is 1423187.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6996025 + 817216 = 2645^2 + 904^2 .

It is an emirp because it is prime and its reverse (1423187) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7813241 - 2⁶ = 7813177 is a prime.

It is a super-2 number, since 2×7813241² = 122093469848162, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 7813243, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 7813241.

It is not a weakly prime, because it can be changed into another prime (7813243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3906620 + 3906621.

It is an arithmetic number, because the mean of its divisors is an integer number (3906621).

Almost surely, 2^7813241 is an apocalyptic number.

It is an amenable number.

7813241 is a deficient number, since it is larger than the sum of its proper divisors (1).

7813241 is an equidigital number, since it uses as much as digits as its factorization.

7813241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344, while the sum is 26.

The square root of 7813241 is about 2795.2175228415. The cubic root of 7813241 is about 198.4314047067.

The spelling of 7813241 in words is "seven million, eight hundred thirteen thousand, two hundred forty-one".