11531542 has 24 divisors (see below), whose sum is σ = 20138328. Its totient is φ = 4931520.

The previous prime is 11531539. The next prime is 11531543. The reversal of 11531542 is 24513511.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11531543) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2713 + ... + 5515.

It is an arithmetic number, because the mean of its divisors is an integer number (839097).

Almost surely, 2^11531542 is an apocalyptic number.

11531542 is a deficient number, since it is larger than the sum of its proper divisors (8606786).

11531542 is a wasteful number, since it uses less digits than its factorization.

11531542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2844 (or 2833 counting only the distinct ones).

The product of its digits is 600, while the sum is 22.

The square root of 11531542 is about 3395.8124212035. The cubic root of 11531542 is about 225.9240484069.

The spelling of 11531542 in words is "eleven million, five hundred thirty-one thousand, five hundred forty-two".