7521522 has 8 divisors (see below), whose sum is σ = 15043056. Its totient is φ = 2507172.

The previous prime is 7521467. The next prime is 7521533. The reversal of 7521522 is 2251257.

It is a sphenic number, since it is the product of 3 distinct primes.

7521522 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 7521492 and 7521501.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 626788 + ... + 626799.

It is an arithmetic number, because the mean of its divisors is an integer number (1880382).

Almost surely, 2^7521522 is an apocalyptic number.

7521522 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7521522 is a wasteful number, since it uses less digits than its factorization.

7521522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253592.

The product of its digits is 1400, while the sum is 24.

The square root of 7521522 is about 2742.5393342667. The cubic root of 7521522 is about 195.9304383166.

Adding to 7521522 its reverse (2251257), we get a palindrome (9772779).

The spelling of 7521522 in words is "seven million, five hundred twenty-one thousand, five hundred twenty-two".