261447086 has 8 divisors (see below), whose sum is σ = 393206520. Its totient is φ = 130378248.

The previous prime is 261447071. The next prime is 261447089. The reversal of 261447086 is 680744162.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261447089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171701 + ... + 173216.

It is an arithmetic number, because the mean of its divisors is an integer number (49150815).

Almost surely, 2^261447086 is an apocalyptic number.

261447086 is a deficient number, since it is larger than the sum of its proper divisors (131759434).

261447086 is a wasteful number, since it uses less digits than its factorization.

261447086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345298.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 261447086 is about 16169.3254652134. The cubic root of 261447086 is about 639.4323465988.

The spelling of 261447086 in words is "two hundred sixty-one million, four hundred forty-seven thousand, eighty-six".