268170721 has 24 divisors (see below), whose sum is σ = 333288384. Its totient is φ = 211273920.

The previous prime is 268170713. The next prime is 268170737. The reversal of 268170721 is 127071862.

It is a happy number.

It is not a de Polignac number, because 268170721 - 2³ = 268170713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (268170761) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 469366 + ... + 469936.

It is an arithmetic number, because the mean of its divisors is an integer number (13887016).

Almost surely, 2^268170721 is an apocalyptic number.

It is an amenable number.

268170721 is a deficient number, since it is larger than the sum of its proper divisors (65117663).

268170721 is a wasteful number, since it uses less digits than its factorization.

268170721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001 (or 988 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 268170721 is about 16375.9189360475. The cubic root of 268170721 is about 644.8674454684.

The spelling of 268170721 in words is "two hundred sixty-eight million, one hundred seventy thousand, seven hundred twenty-one".