7539481 has 2 divisors, whose sum is σ = 7539482. Its totient is φ = 7539480.

The previous prime is 7539451. The next prime is 7539487. The reversal of 7539481 is 1849357.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5363856 + 2175625 = 2316^2 + 1475^2 .

It is an emirp because it is prime and its reverse (1849357) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7539481 - 2⁹ = 7538969 is a prime.

It is a super-2 number, since 2×7539481² = 113687547498722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7539481.

It is not a weakly prime, because it can be changed into another prime (7539487) 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, 3769740 + 3769741.

It is an arithmetic number, because the mean of its divisors is an integer number (3769741).

Almost surely, 2^7539481 is an apocalyptic number.

It is an amenable number.

7539481 is a deficient number, since it is larger than the sum of its proper divisors (1).

7539481 is an equidigital number, since it uses as much as digits as its factorization.

7539481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 37.

The square root of 7539481 is about 2745.8115375969. The cubic root of 7539481 is about 196.0862542063.

The spelling of 7539481 in words is "seven million, five hundred thirty-nine thousand, four hundred eighty-one".