74561530 has 16 divisors (see below), whose sum is σ = 135720360. Its totient is φ = 29489152.

The previous prime is 74561521. The next prime is 74561551. The reversal of 74561530 is 3516547.

It can be written as a sum of positive squares in 4 ways, for example, as 68376361 + 6185169 = 8269^2 + 2487^2 .

It is a junction number, because it is equal to n+sod(n) for n = 74561492 and 74561501.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40999 + ... + 42778.

Almost surely, 2^74561530 is an apocalyptic number.

74561530 is a deficient number, since it is larger than the sum of its proper divisors (61158830).

74561530 is a wasteful number, since it uses less digits than its factorization.

74561530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83873.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 74561530 is about 8634.9018523664. The cubic root of 74561530 is about 420.8929038525.

The spelling of 74561530 in words is "seventy-four million, five hundred sixty-one thousand, five hundred thirty".