8739421 has 4 divisors (see below), whose sum is σ = 8765692. Its totient is φ = 8713152.

The previous prime is 8739397. The next prime is 8739431. The reversal of 8739421 is 1249378.

8739421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2134521 + 6604900 = 1461^2 + 2570^2 .

It is a cyclic number.

It is not a de Polignac number, because 8739421 - 2⁵ = 8739389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8739431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12630 + ... + 13303.

It is an arithmetic number, because the mean of its divisors is an integer number (2191423).

Almost surely, 2^8739421 is an apocalyptic number.

It is an amenable number.

8739421 is a deficient number, since it is larger than the sum of its proper divisors (26271).

8739421 is a wasteful number, since it uses less digits than its factorization.

8739421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26270.

The product of its digits is 12096, while the sum is 34.

The square root of 8739421 is about 2956.2511733613. The cubic root of 8739421 is about 205.9811856383.

The spelling of 8739421 in words is "eight million, seven hundred thirty-nine thousand, four hundred twenty-one".