8721351 has 10 divisors (see below), whose sum is σ = 13028312. Its totient is φ = 5814180.

The previous prime is 8721329. The next prime is 8721359. The reversal of 8721351 is 1531278.

It is not a de Polignac number, because 8721351 - 2⁹ = 8720839 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

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 9 ways as a sum of consecutive naturals, for example, 53755 + ... + 53916.

Almost surely, 2^8721351 is an apocalyptic number.

8721351 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

8721351 is a deficient number, since it is larger than the sum of its proper divisors (4306961).

8721351 is a wasteful number, since it uses less digits than its factorization.

8721351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107683 (or 107674 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 8721351 is about 2953.1933563517. The cubic root of 8721351 is about 205.8391225167.

The spelling of 8721351 in words is "eight million, seven hundred twenty-one thousand, three hundred fifty-one".