261675 has 18 divisors (see below), whose sum is σ = 469092. Its totient is φ = 139440.

The previous prime is 261673. The next prime is 261697. The reversal of 261675 is 576162.

It is not a de Polignac number, because 261675 - 2¹ = 261673 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

261675 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (261673) 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 17 ways as a sum of consecutive naturals, for example, 357 + ... + 806.

2²⁶¹⁶⁷⁵ is an apocalyptic number.

261675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

261675 is a deficient number, since it is larger than the sum of its proper divisors (207417).

261675 is a wasteful number, since it uses less digits than its factorization.

261675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1179 (or 1171 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 261675 is about 511.5417871494. The cubic root of 261675 is about 63.9618098980.

The spelling of 261675 in words is "two hundred sixty-one thousand, six hundred seventy-five".