7481549 has 2 divisors, whose sum is σ = 7481550. Its totient is φ = 7481548.

The previous prime is 7481543. The next prime is 7481563. The reversal of 7481549 is 9451847.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3928324 + 3553225 = 1982^2 + 1885^2 .

It is a cyclic number.

It is not a de Polignac number, because 7481549 - 2⁸ = 7481293 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7481543) 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, 3740774 + 3740775.

It is an arithmetic number, because the mean of its divisors is an integer number (3740775).

Almost surely, 2^7481549 is an apocalyptic number.

It is an amenable number.

7481549 is a deficient number, since it is larger than the sum of its proper divisors (1).

7481549 is an equidigital number, since it uses as much as digits as its factorization.

7481549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 38.

The square root of 7481549 is about 2735.2420368223. The cubic root of 7481549 is about 195.5827319731.

The spelling of 7481549 in words is "seven million, four hundred eighty-one thousand, five hundred forty-nine".