7089521 has 4 divisors (see below), whose sum is σ = 7145472. Its totient is φ = 7033572.

The previous prime is 7089517. The next prime is 7089529. The reversal of 7089521 is 1259807.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1259807 = 41 ⋅30727.

It is a cyclic number.

It is not a de Polignac number, because 7089521 - 2² = 7089517 is a prime.

It is a super-2 number, since 2×7089521² = 100522616018882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7089529) 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, 27785 + ... + 28038.

It is an arithmetic number, because the mean of its divisors is an integer number (1786368).

Almost surely, 2^7089521 is an apocalyptic number.

It is an amenable number.

7089521 is a deficient number, since it is larger than the sum of its proper divisors (55951).

7089521 is a wasteful number, since it uses less digits than its factorization.

7089521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55950.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 7089521 is about 2662.6154435066. The cubic root of 7089521 is about 192.1051308648.

The spelling of 7089521 in words is "seven million, eighty-nine thousand, five hundred twenty-one".