7016521 has 8 divisors (see below), whose sum is σ = 7291080. Its totient is φ = 6744192.

The previous prime is 7016519. The next prime is 7016531. The reversal of 7016521 is 1256107.

It can be written as a sum of positive squares in 4 ways, for example, as 313600 + 6702921 = 560^2 + 2589^2 .

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 7016521 - 2¹ = 7016519 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7016492 and 7016501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7016501) 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, 8691 + ... + 9463.

It is an arithmetic number, because the mean of its divisors is an integer number (911385).

Almost surely, 2^7016521 is an apocalyptic number.

It is an amenable number.

7016521 is a deficient number, since it is larger than the sum of its proper divisors (274559).

7016521 is a wasteful number, since it uses less digits than its factorization.

7016521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 7016521 is about 2648.8716465695. The cubic root of 7016521 is about 191.4434930661.

The spelling of 7016521 in words is "seven million, sixteen thousand, five hundred twenty-one".