261337 has 2 divisors, whose sum is σ = 261338. Its totient is φ = 261336.

The previous prime is 261329. The next prime is 261347. The reversal of 261337 is 733162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 168921 + 92416 = 411^2 + 304^2 .

It is a cyclic number.

It is not a de Polignac number, because 261337 - 2³ = 261329 is a prime.

It is a nialpdrome in base 8.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 261337.

It is not a weakly prime, because it can be changed into another prime (261347) 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 as a sum of consecutive naturals, namely, 130668 + 130669.

It is an arithmetic number, because the mean of its divisors is an integer number (130669).

2²⁶¹³³⁷ is an apocalyptic number.

It is an amenable number.

261337 is a deficient number, since it is larger than the sum of its proper divisors (1).

261337 is an equidigital number, since it uses as much as digits as its factorization.

261337 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756, while the sum is 22.

The square root of 261337 is about 511.2113066042. The cubic root of 261337 is about 63.9342586649.

Adding to 261337 its reverse (733162), we get a palindrome (994499).

The spelling of 261337 in words is "two hundred sixty-one thousand, three hundred thirty-seven".