11142439 has 16 divisors (see below), whose sum is σ = 14270976. Its totient is φ = 8445600.

The previous prime is 11142427. The next prime is 11142449. The reversal of 11142439 is 93424111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11142439 - 2⁷ = 11142311 is a prime.

It is a super-3 number, since 3×11142439³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11142449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 894 + ... + 4804.

It is an arithmetic number, because the mean of its divisors is an integer number (891936).

Almost surely, 2^11142439 is an apocalyptic number.

11142439 is a deficient number, since it is larger than the sum of its proper divisors (3128537).

11142439 is a wasteful number, since it uses less digits than its factorization.

11142439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3966.

The product of its digits is 864, while the sum is 25.

The square root of 11142439 is about 3338.0292089795. The cubic root of 11142439 is about 223.3538391112.

It can be divided in two parts, 1114 and 2439, that added together give a palindrome (3553).

The spelling of 11142439 in words is "eleven million, one hundred forty-two thousand, four hundred thirty-nine".