1131542 has 4 divisors (see below), whose sum is σ = 1697316. Its totient is φ = 565770.

The previous prime is 1131523. The next prime is 1131547. The reversal of 1131542 is 2451311.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1131542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131547) by changing a digit.

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, 282884 + ... + 282887.

It is an arithmetic number, because the mean of its divisors is an integer number (424329).

2^1131542 is an apocalyptic number.

1131542 is a deficient number, since it is larger than the sum of its proper divisors (565774).

1131542 is an equidigital number, since it uses as much as digits as its factorization.

1131542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565773.

The product of its digits is 120, while the sum is 17.

The square root of 1131542 is about 1063.7396297967. The cubic root of 1131542 is about 104.2054002798.

Adding to 1131542 its reverse (2451311), we get a palindrome (3582853).

The spelling of 1131542 in words is "one million, one hundred thirty-one thousand, five hundred forty-two".