8721134 has 4 divisors (see below), whose sum is σ = 13081704. Its totient is φ = 4360566.

The previous prime is 8721121. The next prime is 8721157. The reversal of 8721134 is 4311278.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4311278 = 2 ⋅2155639.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2180282 + ... + 2180285.

It is an arithmetic number, because the mean of its divisors is an integer number (3270426).

Almost surely, 2^8721134 is an apocalyptic number.

8721134 is a deficient number, since it is larger than the sum of its proper divisors (4360570).

8721134 is a wasteful number, since it uses less digits than its factorization.

8721134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4360569.

The product of its digits is 1344, while the sum is 26.

The square root of 8721134 is about 2953.1566162329. The cubic root of 8721134 is about 205.8374153095.

The spelling of 8721134 in words is "eight million, seven hundred twenty-one thousand, one hundred thirty-four".