7552521 has 10 divisors (see below), whose sum is σ = 11282282. Its totient is φ = 5034960.

The previous prime is 7552513. The next prime is 7552529. The reversal of 7552521 is 1252557.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (7552513) and next prime (7552529).

It can be written as a sum of positive squares in only one way, i.e., 7096896 + 455625 = 2664^2 + 675^2 .

It is not a de Polignac number, because 7552521 - 2³ = 7552513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7552529) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 46540 + ... + 46701.

Almost surely, 2^7552521 is an apocalyptic number.

It is an amenable number.

7552521 is a deficient number, since it is larger than the sum of its proper divisors (3729761).

7552521 is an equidigital number, since it uses as much as digits as its factorization.

7552521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93253 (or 93244 counting only the distinct ones).

The product of its digits is 3500, while the sum is 27.

The square root of 7552521 is about 2748.1850374383. The cubic root of 7552521 is about 196.1992368738.

The spelling of 7552521 in words is "seven million, five hundred fifty-two thousand, five hundred twenty-one".