545871145 has 4 divisors (see below), whose sum is σ = 655045380. Its totient is φ = 436696912.

The previous prime is 545871143. The next prime is 545871181. The reversal of 545871145 is 541178545.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541178545 = 5 ⋅108235709.

It can be written as a sum of positive squares in 2 ways, for example, as 62047129 + 483824016 = 7877^2 + 21996^2 .

It is a cyclic number.

It is not a de Polignac number, because 545871145 - 2¹ = 545871143 is a prime.

It is a super-2 number, since 2×545871145² = 595950613887222050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 545871098 and 545871107.

It is not an unprimeable number, because it can be changed into a prime (545871143) 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 3 ways as a sum of consecutive naturals, for example, 54587110 + ... + 54587119.

It is an arithmetic number, because the mean of its divisors is an integer number (163761345).

Almost surely, 2^545871145 is an apocalyptic number.

It is an amenable number.

545871145 is a deficient number, since it is larger than the sum of its proper divisors (109174235).

545871145 is a wasteful number, since it uses less digits than its factorization.

545871145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109174234.

The product of its digits is 112000, while the sum is 40.

The square root of 545871145 is about 23363.8854859375. The cubic root of 545871145 is about 817.2659013541.

The spelling of 545871145 in words is "five hundred forty-five million, eight hundred seventy-one thousand, one hundred forty-five".