261466121 has 16 divisors (see below), whose sum is σ = 309027840. Its totient is φ = 216483840.

The previous prime is 261466099. The next prime is 261466129. The reversal of 261466121 is 121664162.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261466121 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (261466129) 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 15 ways as a sum of consecutive naturals, for example, 200945 + ... + 202241.

It is an arithmetic number, because the mean of its divisors is an integer number (19314240).

Almost surely, 2^261466121 is an apocalyptic number.

It is an amenable number.

261466121 is a deficient number, since it is larger than the sum of its proper divisors (47561719).

261466121 is a wasteful number, since it uses less digits than its factorization.

261466121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2264.

The product of its digits is 3456, while the sum is 29.

The square root of 261466121 is about 16169.9140690357. The cubic root of 261466121 is about 639.4478644607.

The spelling of 261466121 in words is "two hundred sixty-one million, four hundred sixty-six thousand, one hundred twenty-one".