74545 has 8 divisors (see below), whose sum is σ = 94824. Its totient is φ = 56064.

The previous prime is 74531. The next prime is 74551. The reversal of 74545 is 54547.

It can be written as a sum of positive squares in 4 ways, for example, as 27889 + 46656 = 167^2 + 216^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 74545 - 2¹¹ = 72497 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 354 + ... + 523.

It is an arithmetic number, because the mean of its divisors is an integer number (11853).

2⁷⁴⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

74545 is a deficient number, since it is larger than the sum of its proper divisors (20279).

74545 is a wasteful number, since it uses less digits than its factorization.

74545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899.

The product of its digits is 2800, while the sum is 25.

The square root of 74545 is about 273.0293024567. The cubic root of 74545 is about 42.0861798116.

The spelling of 74545 in words is "seventy-four thousand, five hundred forty-five".