168287261 has 8 divisors (see below), whose sum is σ = 174264480. Its totient is φ = 162321712.

The previous prime is 168287257. The next prime is 168287281. The reversal of 168287261 is 162782861.

168287261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 168287261 - 2² = 168287257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168287281) 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, 34946 + ... + 39468.

It is an arithmetic number, because the mean of its divisors is an integer number (21783060).

Almost surely, 2^168287261 is an apocalyptic number.

It is an amenable number.

168287261 is a deficient number, since it is larger than the sum of its proper divisors (5977219).

168287261 is a wasteful number, since it uses less digits than its factorization.

168287261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5835.

The product of its digits is 64512, while the sum is 41.

The square root of 168287261 is about 12972.5579975578. The cubic root of 168287261 is about 552.0991527498.

The spelling of 168287261 in words is "one hundred sixty-eight million, two hundred eighty-seven thousand, two hundred sixty-one".