8380521 has 6 divisors (see below), whose sum is σ = 12105210. Its totient is φ = 5587008.

The previous prime is 8380511. The next prime is 8380531. The reversal of 8380521 is 1250838.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (8380511) and next prime (8380531).

It can be written as a sum of positive squares in only one way, i.e., 7080921 + 1299600 = 2661^2 + 1140^2 .

It is not a de Polignac number, because 8380521 - 2¹⁵ = 8347753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8380511) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 465576 + ... + 465593.

It is an arithmetic number, because the mean of its divisors is an integer number (2017535).

Almost surely, 2^8380521 is an apocalyptic number.

It is an amenable number.

8380521 is a deficient number, since it is larger than the sum of its proper divisors (3724689).

8380521 is a wasteful number, since it uses less digits than its factorization.

8380521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931175 (or 931172 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 8380521 is about 2894.9129520592. The cubic root of 8380521 is about 203.1220197117.

The spelling of 8380521 in words is "eight million, three hundred eighty thousand, five hundred twenty-one".