7287522 has 32 divisors (see below), whose sum is σ = 16061760. Its totient is φ = 2185920.

The previous prime is 7287499. The next prime is 7287547. The reversal of 7287522 is 2257827.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6688 + ... + 7700.

It is an arithmetic number, because the mean of its divisors is an integer number (501930).

Almost surely, 2^7287522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7287522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8030880).

7287522 is an abundant number, since it is smaller than the sum of its proper divisors (8774238).

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

7287522 is a wasteful number, since it uses less digits than its factorization.

7287522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138.

The product of its digits is 15680, while the sum is 33.

The square root of 7287522 is about 2699.5410721084. The cubic root of 7287522 is about 193.8771496988.

The spelling of 7287522 in words is "seven million, two hundred eighty-seven thousand, five hundred twenty-two".