261146271 has 8 divisors (see below), whose sum is σ = 352602880. Its totient is φ = 171893592.

The previous prime is 261146251. The next prime is 261146297. The reversal of 261146271 is 172641162.

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

It is not a de Polignac number, because 261146271 - 2²⁵ = 227591839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261146251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 550705 + ... + 551178.

It is an arithmetic number, because the mean of its divisors is an integer number (44075360).

Almost surely, 2^261146271 is an apocalyptic number.

261146271 is a deficient number, since it is larger than the sum of its proper divisors (91456609).

261146271 is a wasteful number, since it uses less digits than its factorization.

261146271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101965.

The product of its digits is 4032, while the sum is 30.

The square root of 261146271 is about 16160.0207611253. The cubic root of 261146271 is about 639.1870137694.

It can be divided in two parts, 26114 and 6271, that added together give a triangular number (32385 = T₂₅₄).

The spelling of 261146271 in words is "two hundred sixty-one million, one hundred forty-six thousand, two hundred seventy-one".