261466 has 8 divisors (see below), whose sum is σ = 394560. Its totient is φ = 129948.

The previous prime is 261463. The next prime is 261467. The reversal of 261466 is 664162.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nialpdrome in base 8.

It is a zygodrome in base 4.

It is a self number, because there is not a number n which added to its sum of digits gives 261466.

It is not an unprimeable number, because it can be changed into a prime (261463) 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 3 ways as a sum of consecutive naturals, for example, 205 + ... + 751.

It is an arithmetic number, because the mean of its divisors is an integer number (49320).

2²⁶¹⁴⁶⁶ is an apocalyptic number.

261466 is a deficient number, since it is larger than the sum of its proper divisors (133094).

261466 is a wasteful number, since it uses less digits than its factorization.

261466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788.

The product of its digits is 1728, while the sum is 25.

The square root of 261466 is about 511.3374619564. The cubic root of 261466 is about 63.9447765821.

It can be divided in two parts, 261 and 466, that added together give a palindrome (727).

The spelling of 261466 in words is "two hundred sixty-one thousand, four hundred sixty-six".