7942481 has 2 divisors, whose sum is σ = 7942482. Its totient is φ = 7942480.

The previous prime is 7942477. The next prime is 7942499. The reversal of 7942481 is 1842497.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6027025 + 1915456 = 2455^2 + 1384^2 .

It is an emirp because it is prime and its reverse (1842497) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7942481 - 2² = 7942477 is a prime.

It is a super-2 number, since 2×7942481² = 126166008870722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7942411) 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, 3971240 + 3971241.

It is an arithmetic number, because the mean of its divisors is an integer number (3971241).

Almost surely, 2^7942481 is an apocalyptic number.

It is an amenable number.

7942481 is a deficient number, since it is larger than the sum of its proper divisors (1).

7942481 is an equidigital number, since it uses as much as digits as its factorization.

7942481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 35.

The square root of 7942481 is about 2818.2407633132. The cubic root of 7942481 is about 199.5195216270.

The spelling of 7942481 in words is "seven million, nine hundred forty-two thousand, four hundred eighty-one".