545740321 has 8 divisors (see below), whose sum is σ = 627677120. Its totient is φ = 464797008.

The previous prime is 545740309. The next prime is 545740331. The reversal of 545740321 is 123047545.

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 545740321 - 2¹⁹ = 545216033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (545740331) 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 7 ways as a sum of consecutive naturals, for example, 247191 + ... + 249388.

It is an arithmetic number, because the mean of its divisors is an integer number (78459640).

Almost surely, 2^545740321 is an apocalyptic number.

It is an amenable number.

545740321 is a deficient number, since it is larger than the sum of its proper divisors (81936799).

545740321 is a wasteful number, since it uses less digits than its factorization.

545740321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496743.

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 545740321 is about 23361.0856126166. The cubic root of 545740321 is about 817.2006072288.

Adding to 545740321 its reverse (123047545), we get a palindrome (668787866).

The spelling of 545740321 in words is "five hundred forty-five million, seven hundred forty thousand, three hundred twenty-one".