495380261 has 4 divisors (see below), whose sum is σ = 500487372. Its totient is φ = 490273152.

The previous prime is 495380213. The next prime is 495380269. The reversal of 495380261 is 162083594.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 162083594 = 2 ⋅81041797.

It can be written as a sum of positive squares in 2 ways, for example, as 332332900 + 163047361 = 18230^2 + 12769^2 .

It is a cyclic number.

It is not a de Polignac number, because 495380261 - 2¹⁰ = 495379237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (495380269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2553410 + ... + 2553603.

It is an arithmetic number, because the mean of its divisors is an integer number (125121843).

Almost surely, 2^495380261 is an apocalyptic number.

It is an amenable number.

495380261 is a deficient number, since it is larger than the sum of its proper divisors (5107111).

495380261 is an equidigital number, since it uses as much as digits as its factorization.

495380261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5107110.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 495380261 is about 22257.1395511643. The cubic root of 495380261 is about 791.2484990742.

The spelling of 495380261 in words is "four hundred ninety-five million, three hundred eighty thousand, two hundred sixty-one".