7987241 has 2 divisors, whose sum is σ = 7987242. Its totient is φ = 7987240.

The previous prime is 7987223. The next prime is 7987247. The reversal of 7987241 is 1427897.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6786025 + 1201216 = 2605^2 + 1096^2 .

It is an emirp because it is prime and its reverse (1427897) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7987241 - 2¹⁰ = 7986217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7987195 and 7987204.

It is not a weakly prime, because it can be changed into another prime (7987247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3993620 + 3993621.

It is an arithmetic number, because the mean of its divisors is an integer number (3993621).

Almost surely, 2^7987241 is an apocalyptic number.

It is an amenable number.

7987241 is a deficient number, since it is larger than the sum of its proper divisors (1).

7987241 is an equidigital number, since it uses as much as digits as its factorization.

7987241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 38.

The square root of 7987241 is about 2826.1707308654. The cubic root of 7987241 is about 199.8936184248.

It can be divided in two parts, 7987 and 241, that added together give a palindrome (8228).

The spelling of 7987241 in words is "seven million, nine hundred eighty-seven thousand, two hundred forty-one".