1131025532 has 48 divisors (see below), whose sum is σ = 2446352832. Its totient is φ = 445547520.

The previous prime is 1131025501. The next prime is 1131025537. The reversal of 1131025532 is 2355201311.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1131025498 and 1131025507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131025537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81278 + ... + 94170.

It is an arithmetic number, because the mean of its divisors is an integer number (50965684).

Almost surely, 2^1131025532 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1131025532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1223176416).

1131025532 is an abundant number, since it is smaller than the sum of its proper divisors (1315327300).

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

1131025532 is a wasteful number, since it uses less digits than its factorization.

1131025532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13158 (or 13156 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 1131025532 is about 33630.7230371278. The cubic root of 1131025532 is about 1041.8954376285.

Adding to 1131025532 its reverse (2355201311), we get a palindrome (3486226843).

The spelling of 1131025532 in words is "one billion, one hundred thirty-one million, twenty-five thousand, five hundred thirty-two".