7227521 has 8 divisors (see below), whose sum is σ = 8461824. Its totient is φ = 6043680.

The previous prime is 7227461. The next prime is 7227527. The reversal of 7227521 is 1257227.

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 7227521 - 2⁶ = 7227457 is a prime.

It is a super-3 number, since 3×7227521³ (a number of 22 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (7227527) 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, 12305 + ... + 12878.

It is an arithmetic number, because the mean of its divisors is an integer number (1057728).

Almost surely, 2^7227521 is an apocalyptic number.

It is an amenable number.

7227521 is a deficient number, since it is larger than the sum of its proper divisors (1234303).

7227521 is a wasteful number, since it uses less digits than its factorization.

7227521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25231.

The product of its digits is 1960, while the sum is 26.

The square root of 7227521 is about 2688.4049174185. The cubic root of 7227521 is about 193.3435940518.

The spelling of 7227521 in words is "seven million, two hundred twenty-seven thousand, five hundred twenty-one".