11142542 has 4 divisors (see below), whose sum is σ = 16713816. Its totient is φ = 5571270.

The previous prime is 11142539. The next prime is 11142553. The reversal of 11142542 is 24524111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24524111 = 29 ⋅845659.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2785634 + ... + 2785637.

It is an arithmetic number, because the mean of its divisors is an integer number (4178454).

Almost surely, 2^11142542 is an apocalyptic number.

11142542 is a deficient number, since it is larger than the sum of its proper divisors (5571274).

11142542 is an equidigital number, since it uses as much as digits as its factorization.

11142542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5571273.

The product of its digits is 320, while the sum is 20.

The square root of 11142542 is about 3338.0446372090. The cubic root of 11142542 is about 223.3545273320.

Adding to 11142542 its reverse (24524111), we get a palindrome (35666653).

The spelling of 11142542 in words is "eleven million, one hundred forty-two thousand, five hundred forty-two".