495573121 has 4 divisors (see below), whose sum is σ = 495624532. Its totient is φ = 495521712.

The previous prime is 495573101. The next prime is 495573149. The reversal of 495573121 is 121375594.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 140778225 + 354794896 = 11865^2 + 18836^2 .

It is a 3-Lehmer number, since φ(495573121) divides (495573121-1)³.

It is a cyclic number.

It is not a de Polignac number, because 495573121 - 2¹³ = 495564929 is a prime.

It is a deceptive number, since it divides R_495573120.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (495573101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6426 + ... + 32131.

It is an arithmetic number, because the mean of its divisors is an integer number (123906133).

Almost surely, 2^495573121 is an apocalyptic number.

495573121 is the 12853-rd octagonal number.

It is an amenable number.

495573121 is a deficient number, since it is larger than the sum of its proper divisors (51411).

495573121 is a wasteful number, since it uses less digits than its factorization.

495573121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51410.

The product of its digits is 37800, while the sum is 37.

The square root of 495573121 is about 22261.4716719268. The cubic root of 495573121 is about 791.3511679386.

The spelling of 495573121 in words is "four hundred ninety-five million, five hundred seventy-three thousand, one hundred twenty-one".