74675521 has 2 divisors, whose sum is σ = 74675522. Its totient is φ = 74675520.

The previous prime is 74675519. The next prime is 74675593. The reversal of 74675521 is 12557647.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74649600 + 25921 = 8640^2 + 161^2 .

It is an emirp because it is prime and its reverse (12557647) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74675521 - 2¹ = 74675519 is a prime.

Together with 74675519, it forms a pair of twin primes.

It is equal to p_4376377 and since 74675521 and 4376377 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (74675501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37337760 + 37337761.

It is an arithmetic number, because the mean of its divisors is an integer number (37337761).

Almost surely, 2^74675521 is an apocalyptic number.

It is an amenable number.

74675521 is a deficient number, since it is larger than the sum of its proper divisors (1).

74675521 is an equidigital number, since it uses as much as digits as its factorization.

74675521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58800, while the sum is 37.

The square root of 74675521 is about 8641.4999276746. The cubic root of 74675521 is about 421.1072841720.

It can be divided in two parts, 746 and 75521, that added together give a palindrome (76267).

The spelling of 74675521 in words is "seventy-four million, six hundred seventy-five thousand, five hundred twenty-one".