7236521 has 4 divisors (see below), whose sum is σ = 7323792. Its totient is φ = 7149252.

The previous prime is 7236503. The next prime is 7236529. The reversal of 7236521 is 1256327.

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: 1256327 = 353 ⋅3559.

It is a cyclic number.

It is not a de Polignac number, because 7236521 - 2¹⁰ = 7235497 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7236529) 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, 43511 + ... + 43676.

It is an arithmetic number, because the mean of its divisors is an integer number (1830948).

Almost surely, 2^7236521 is an apocalyptic number.

It is an amenable number.

7236521 is a deficient number, since it is larger than the sum of its proper divisors (87271).

7236521 is an equidigital number, since it uses as much as digits as its factorization.

7236521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87270.

The product of its digits is 2520, while the sum is 26.

The square root of 7236521 is about 2690.0782516499. The cubic root of 7236521 is about 193.4238138380.

The spelling of 7236521 in words is "seven million, two hundred thirty-six thousand, five hundred twenty-one".