74530 has 16 divisors (see below), whose sum is σ = 139320. Its totient is φ = 28672.

The previous prime is 74527. The next prime is 74531. The reversal of 74530 is 3547.

74530 = 36² + 37² + ... + 64².

It is a Cunningham number, because it is equal to 273²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 73441 + 1089 = 271^2 + 33^2 .

It is a junction number, because it is equal to n+sod(n) for n = 74498 and 74507.

It is not an unprimeable number, because it can be changed into a prime (74531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162 + ... + 418.

2⁷⁴⁵³⁰ is an apocalyptic number.

74530 is a deficient number, since it is larger than the sum of its proper divisors (64790).

74530 is a wasteful number, since it uses less digits than its factorization.

74530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293.

The product of its (nonzero) digits is 420, while the sum is 19.

The square root of 74530 is about 273.0018314957. The cubic root of 74530 is about 42.0833567515.

The spelling of 74530 in words is "seventy-four thousand, five hundred thirty".