43261 has 2 divisors, whose sum is σ = 43262. Its totient is φ = 43260.

The previous prime is 43237. The next prime is 43271. The reversal of 43261 is 16234.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37636 + 5625 = 194^2 + 75^2 .

It is a cyclic number.

It is not a de Polignac number, because 43261 - 2⁷ = 43133 is a prime.

It is a nialpdrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21630 + 21631.

It is an arithmetic number, because the mean of its divisors is an integer number (21631).

2⁴³²⁶¹ is an apocalyptic number.

It is an amenable number.

43261 is a deficient number, since it is larger than the sum of its proper divisors (1).

43261 is an equidigital number, since it uses as much as digits as its factorization.

43261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 16.

The square root of 43261 is about 207.9927883365. The cubic root of 43261 is about 35.1047203766.

Adding to 43261 its reverse (16234), we get a palindrome (59495).

The spelling of 43261 in words is "forty-three thousand, two hundred sixty-one".