261433 has 2 divisors, whose sum is σ = 261434. Its totient is φ = 261432.

The previous prime is 261431. The next prime is 261439. The reversal of 261433 is 334162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150544 + 110889 = 388^2 + 333^2 .

It is a cyclic number.

It is not a de Polignac number, because 261433 - 2¹ = 261431 is a prime.

Together with 261431, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 261433.

It is not a weakly prime, because it can be changed into another prime (261431) 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, 130716 + 130717.

It is an arithmetic number, because the mean of its divisors is an integer number (130717).

2²⁶¹⁴³³ is an apocalyptic number.

It is an amenable number.

261433 is a deficient number, since it is larger than the sum of its proper divisors (1).

261433 is an equidigital number, since it uses as much as digits as its factorization.

261433 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 19.

The square root of 261433 is about 511.3051926198. The cubic root of 261433 is about 63.9420862815.

Adding to 261433 its reverse (334162), we get a palindrome (595595).

The spelling of 261433 in words is "two hundred sixty-one thousand, four hundred thirty-three".