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7522 = 23761
BaseRepresentation
bin1110101100010
3101022121
41311202
5220042
654454
730634
oct16542
911277
107522
115719
12442a
133568
142a54
152367
hex1d62

7522 has 4 divisors (see below), whose sum is σ = 11286. Its totient is φ = 3760.

The previous prime is 7517. The next prime is 7523. The reversal of 7522 is 2257.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2257 = 3761.

It can be written as a sum of positive squares in only one way, i.e., 6561 + 961 = 81^2 + 31^2 .

It is an Ulam number.

It is a plaindrome in base 9, base 13 and base 15.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 7496 and 7505.

It is not an unprimeable number, because it can be changed into a prime (7523) by changing a digit.

7522 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1879 + ... + 1882.

27522 is an apocalyptic number.

7522 is a deficient number, since it is larger than the sum of its proper divisors (3764).

7522 is a wasteful number, since it uses less digits than its factorization.

7522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3763.

The product of its digits is 140, while the sum is 16.

The square root of 7522 is about 86.7294644282. The cubic root of 7522 is about 19.5934588752.

Adding to 7522 its reverse (2257), we get a palindrome (9779).

It can be divided in two parts, 7 and 522, that added together give a square (529 = 232).

The spelling of 7522 in words is "seven thousand, five hundred twenty-two".

Divisors: 1 2 3761 7522