8878521 has 4 divisors (see below), whose sum is σ = 11838032. Its totient is φ = 5919012.

The previous prime is 8878517. The next prime is 8878531. The reversal of 8878521 is 1258788.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 8878521 - 2² = 8878517 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8878521.

It is not an unprimeable number, because it can be changed into a prime (8878531) 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, 1479751 + ... + 1479756.

It is an arithmetic number, because the mean of its divisors is an integer number (2959508).

Almost surely, 2^8878521 is an apocalyptic number.

It is an amenable number.

8878521 is a deficient number, since it is larger than the sum of its proper divisors (2959511).

8878521 is a wasteful number, since it uses less digits than its factorization.

8878521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2959510.

The product of its digits is 35840, while the sum is 39.

The square root of 8878521 is about 2979.6847148650. The cubic root of 8878521 is about 207.0682637934.

The spelling of 8878521 in words is "eight million, eight hundred seventy-eight thousand, five hundred twenty-one".