261360001 has 8 divisors (see below), whose sum is σ = 301777280. Its totient is φ = 221712768.

The previous prime is 261359999. The next prime is 261360037. The reversal of 261360001 is 100063162.

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

It is a cyclic number.

It is not a de Polignac number, because 261360001 - 2¹ = 261359999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261360041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191781 + ... + 193138.

It is an arithmetic number, because the mean of its divisors is an integer number (37722160).

Almost surely, 2^261360001 is an apocalyptic number.

It is an amenable number.

261360001 is a deficient number, since it is larger than the sum of its proper divisors (40417279).

261360001 is an equidigital number, since it uses as much as digits as its factorization.

261360001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385023.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 261360001 is about 16166.6323332969. The cubic root of 261360001 is about 639.3613428754.

The spelling of 261360001 in words is "two hundred sixty-one million, three hundred sixty thousand, one".