8273521 has 8 divisors (see below), whose sum is σ = 8410464. Its totient is φ = 8137920.

The previous prime is 8273479. The next prime is 8273527. The reversal of 8273521 is 1253728.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8273521 - 2¹³ = 8265329 is a prime.

It is a super-2 number, since 2×8273521² = 136902299474882, which contains 22 as substring.

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 8273521.

It is not an unprimeable number, because it can be changed into a prime (8273527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23670 + ... + 24016.

It is an arithmetic number, because the mean of its divisors is an integer number (1051308).

Almost surely, 2^8273521 is an apocalyptic number.

It is an amenable number.

8273521 is a deficient number, since it is larger than the sum of its proper divisors (136943).

8273521 is a wasteful number, since it uses less digits than its factorization.

8273521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671.

The product of its digits is 3360, while the sum is 28.

The square root of 8273521 is about 2876.3728895955. The cubic root of 8273521 is about 202.2538471228.

It can be divided in two parts, 8 and 273521, that added together give a square (273529 = 523²).

The spelling of 8273521 in words is "eight million, two hundred seventy-three thousand, five hundred twenty-one".