261479 has 6 divisors (see below), whose sum is σ = 270144. Its totient is φ = 253080.

The previous prime is 261467. The next prime is 261509. The reversal of 261479 is 974162.

It is not a de Polignac number, because 261479 - 2⁴ = 261463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 261479.

It is not an unprimeable number, because it can be changed into a prime (261439) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1274 + ... + 1464.

It is an arithmetic number, because the mean of its divisors is an integer number (45024).

2²⁶¹⁴⁷⁹ is an apocalyptic number.

261479 is a deficient number, since it is larger than the sum of its proper divisors (8665).

261479 is an equidigital number, since it uses as much as digits as its factorization.

261479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265 (or 228 counting only the distinct ones).

The product of its digits is 3024, while the sum is 29.

The square root of 261479 is about 511.3501735602. The cubic root of 261479 is about 63.9458363353.

The spelling of 261479 in words is "two hundred sixty-one thousand, four hundred seventy-nine".