74320545 has 32 divisors (see below), whose sum is σ = 128644992. Its totient is φ = 36421632.

The previous prime is 74320541. The next prime is 74320573. The reversal of 74320545 is 54502347.

It is not a de Polignac number, because 74320545 - 2² = 74320541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (74320541) 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 in 31 ways as a sum of consecutive naturals, for example, 49374 + ... + 50856.

It is an arithmetic number, because the mean of its divisors is an integer number (4020156).

Almost surely, 2^74320545 is an apocalyptic number.

It is an amenable number.

74320545 is a deficient number, since it is larger than the sum of its proper divisors (54324447).

74320545 is a wasteful number, since it uses less digits than its factorization.

74320545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1761.

The product of its (nonzero) digits is 16800, while the sum is 30.

The square root of 74320545 is about 8620.9364340540. The cubic root of 74320545 is about 420.4389684842.

The spelling of 74320545 in words is "seventy-four million, three hundred twenty thousand, five hundred forty-five".