11531442 has 64 divisors (see below), whose sum is σ = 27095040. Its totient is φ = 3240000.

The previous prime is 11531431. The next prime is 11531449. The reversal of 11531442 is 24413511.

It is not an unprimeable number, because it can be changed into a prime (11531449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45817 + ... + 46067.

It is an arithmetic number, because the mean of its divisors is an integer number (423360).

Almost surely, 2^11531442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11531442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13547520).

11531442 is an abundant number, since it is smaller than the sum of its proper divisors (15563598).

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

11531442 is a wasteful number, since it uses less digits than its factorization.

11531442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319.

The product of its digits is 480, while the sum is 21.

The square root of 11531442 is about 3395.7976971545. The cubic root of 11531442 is about 225.9233953439.

Adding to 11531442 its reverse (24413511), we get a palindrome (35944953).

The spelling of 11531442 in words is "eleven million, five hundred thirty-one thousand, four hundred forty-two".