8888521 has 2 divisors, whose sum is σ = 8888522. Its totient is φ = 8888520.

The previous prime is 8888507. The next prime is 8888531. The reversal of 8888521 is 1258888.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4888521 + 4000000 = 2211^2 + 2000^2 .

It is a cyclic number.

It is not a de Polignac number, because 8888521 - 2⁵ = 8888489 is a prime.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (8888531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4444260 + 4444261.

It is an arithmetic number, because the mean of its divisors is an integer number (4444261).

Almost surely, 2^8888521 is an apocalyptic number.

It is an amenable number.

8888521 is a deficient number, since it is larger than the sum of its proper divisors (1).

8888521 is an equidigital number, since it uses as much as digits as its factorization.

8888521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40960, while the sum is 40.

The square root of 8888521 is about 2981.3622725191. The cubic root of 8888521 is about 207.1459759000.

It can be divided in two parts, 8888 and 521, that added together give a square (9409 = 97²).

The spelling of 8888521 in words is "eight million, eight hundred eighty-eight thousand, five hundred twenty-one".