8721154 has 8 divisors (see below), whose sum is σ = 14088060. Its totient is φ = 4025136.

The previous prime is 8721121. The next prime is 8721157. The reversal of 8721154 is 4511278.

It can be written as a sum of positive squares in 2 ways, for example, as 8614225 + 106929 = 2935^2 + 327^2 .

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

It is not an unprimeable number, because it can be changed into a prime (8721157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167689 + ... + 167740.

Almost surely, 2^8721154 is an apocalyptic number.

8721154 is a deficient number, since it is larger than the sum of its proper divisors (5366906).

8721154 is a wasteful number, since it uses less digits than its factorization.

8721154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335444.

The product of its digits is 2240, while the sum is 28.

The square root of 8721154 is about 2953.1600024381. The cubic root of 8721154 is about 205.8375726570.

The spelling of 8721154 in words is "eight million, seven hundred twenty-one thousand, one hundred fifty-four".