1131522 has 32 divisors (see below), whose sum is σ = 2678400. Its totient is φ = 311808.

The previous prime is 1131509. The next prime is 1131523. The reversal of 1131522 is 2251311.

It is not an unprimeable number, because it can be changed into a prime (1131523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 754 + ... + 1682.

It is an arithmetic number, because the mean of its divisors is an integer number (83700).

2^1131522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1131522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1339200).

1131522 is an abundant number, since it is smaller than the sum of its proper divisors (1546878).

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

1131522 is a wasteful number, since it uses less digits than its factorization.

1131522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970.

The product of its digits is 60, while the sum is 15.

The square root of 1131522 is about 1063.7302289585. The cubic root of 1131522 is about 104.2047863329.

Adding to 1131522 its reverse (2251311), we get a palindrome (3382833).

It can be divided in two parts, 1131 and 522, that added together give a triangular number (1653 = T₅₇).

The spelling of 1131522 in words is "one million, one hundred thirty-one thousand, five hundred twenty-two".