1131530 has 8 divisors (see below), whose sum is σ = 2036772. Its totient is φ = 452608.

The previous prime is 1131523. The next prime is 1131547. The reversal of 1131530 is 351311.

It can be written as a sum of positive squares in 2 ways, for example, as 1087849 + 43681 = 1043^2 + 209^2 .

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

It is an Ulam number.

It is a Curzon number.

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, 56567 + ... + 56586.

2^1131530 is an apocalyptic number.

1131530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1131530 is a deficient number, since it is larger than the sum of its proper divisors (905242).

1131530 is a wasteful number, since it uses less digits than its factorization.

1131530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113160.

The product of its (nonzero) digits is 45, while the sum is 14.

The square root of 1131530 is about 1063.7339893037. The cubic root of 1131530 is about 104.2050319125.

Adding to 1131530 its reverse (351311), we get a palindrome (1482841).

It can be divided in two parts, 1131 and 530, that added together give a palindrome (1661).

The spelling of 1131530 in words is "one million, one hundred thirty-one thousand, five hundred thirty".