261459 has 24 divisors (see below), whose sum is σ = 436800. Its totient is φ = 149040.

The previous prime is 261451. The next prime is 261463. The reversal of 261459 is 954162.

It is not a de Polignac number, because 261459 - 2³ = 261451 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 261459.

It is not an unprimeable number, because it can be changed into a prime (261451) 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 in 23 ways as a sum of consecutive naturals, for example, 1812 + ... + 1950.

It is an arithmetic number, because the mean of its divisors is an integer number (18200).

2²⁶¹⁴⁵⁹ is an apocalyptic number.

261459 is a deficient number, since it is larger than the sum of its proper divisors (175341).

261459 is a wasteful number, since it uses less digits than its factorization.

261459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175 (or 172 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 261459 is about 511.3306171158. The cubic root of 261459 is about 63.9442059311.

It can be divided in two parts, 26 and 1459, that added together give a triangular number (1485 = T₅₄).

The spelling of 261459 in words is "two hundred sixty-one thousand, four hundred fifty-nine".