7247521 has 8 divisors (see below), whose sum is σ = 7656704. Its totient is φ = 6849360.

The previous prime is 7247497. The next prime is 7247533. The reversal of 7247521 is 1257427.

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 7247521 - 2⁷ = 7247393 is a prime.

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 7247521.

It is not an unprimeable number, because it can be changed into a prime (7247551) 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, 1386 + ... + 4051.

It is an arithmetic number, because the mean of its divisors is an integer number (957088).

Almost surely, 2^7247521 is an apocalyptic number.

It is an amenable number.

7247521 is a deficient number, since it is larger than the sum of its proper divisors (409183).

7247521 is a wasteful number, since it uses less digits than its factorization.

7247521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5511.

The product of its digits is 3920, while the sum is 28.

The square root of 7247521 is about 2692.1220254662. The cubic root of 7247521 is about 193.5217699691.

The spelling of 7247521 in words is "seven million, two hundred forty-seven thousand, five hundred twenty-one".