313261 has 4 divisors (see below), whose sum is σ = 337372. Its totient is φ = 289152.

The previous prime is 313249. The next prime is 313267. The reversal of 313261 is 162313.

313261 = T₂₁₃ + T₂₁₄ + ... + T₂₂₅.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 145161 + 168100 = 381^2 + 410^2 .

It is a cyclic number.

It is not a de Polignac number, because 313261 - 2⁷ = 313133 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 (313267) 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, 12036 + ... + 12061.

It is an arithmetic number, because the mean of its divisors is an integer number (84343).

2³¹³²⁶¹ is an apocalyptic number.

It is an amenable number.

313261 is a deficient number, since it is larger than the sum of its proper divisors (24111).

313261 is a wasteful number, since it uses less digits than its factorization.

313261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24110.

The product of its digits is 108, while the sum is 16.

The square root of 313261 is about 559.6972395858. The cubic root of 313261 is about 67.9154803428.

Adding to 313261 its reverse (162313), we get a palindrome (475574).

The spelling of 313261 in words is "three hundred thirteen thousand, two hundred sixty-one".