316261 has 4 divisors (see below), whose sum is σ = 345024. Its totient is φ = 287500.

The previous prime is 316259. The next prime is 316271. The reversal of 316261 is 162613.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 162613 = 11 ⋅14783.

It is a cyclic number.

It is not a de Polignac number, because 316261 - 2¹ = 316259 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 (316201) 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, 14365 + ... + 14386.

It is an arithmetic number, because the mean of its divisors is an integer number (86256).

2³¹⁶²⁶¹ is an apocalyptic number.

316261 is the 252-nd centered decagonal number.

It is an amenable number.

316261 is a deficient number, since it is larger than the sum of its proper divisors (28763).

316261 is a wasteful number, since it uses less digits than its factorization.

316261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28762.

The product of its digits is 216, while the sum is 19.

The square root of 316261 is about 562.3708740680. The cubic root of 316261 is about 68.1315935037.

Adding to 316261 its reverse (162613), we get a palindrome (478874).

It can be divided in two parts, 3162 and 61, that added together give a palindrome (3223).

The spelling of 316261 in words is "three hundred sixteen thousand, two hundred sixty-one".