8721357 has 8 divisors (see below), whose sum is σ = 12312576. Its totient is φ = 5472192.

The previous prime is 8721329. The next prime is 8721359. The reversal of 8721357 is 7531278.

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

It is not a de Polignac number, because 8721357 - 2⁸ = 8721101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8721359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85453 + ... + 85554.

It is an arithmetic number, because the mean of its divisors is an integer number (1539072).

Almost surely, 2^8721357 is an apocalyptic number.

It is an amenable number.

8721357 is a deficient number, since it is larger than the sum of its proper divisors (3591219).

8721357 is a wasteful number, since it uses less digits than its factorization.

8721357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171027.

The product of its digits is 11760, while the sum is 33.

The square root of 8721357 is about 2953.1943722011. The cubic root of 8721357 is about 205.8391697202.

The spelling of 8721357 in words is "eight million, seven hundred twenty-one thousand, three hundred fifty-seven".