261260170 has 8 divisors (see below), whose sum is σ = 470268324. Its totient is φ = 104504064.

The previous prime is 261260143. The next prime is 261260177. The reversal of 261260170 is 71062162.

It can be written as a sum of positive squares in 2 ways, for example, as 254179249 + 7080921 = 15943^2 + 2661^2 .

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

It is not an unprimeable number, because it can be changed into a prime (261260177) 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, 13062999 + ... + 13063018.

Almost surely, 2^261260170 is an apocalyptic number.

261260170 is a deficient number, since it is larger than the sum of its proper divisors (209008154).

261260170 is a wasteful number, since it uses less digits than its factorization.

261260170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26126024.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 261260170 is about 16163.5444751453. The cubic root of 261260170 is about 639.2799274453.

The spelling of 261260170 in words is "two hundred sixty-one million, two hundred sixty thousand, one hundred seventy".