11721142 has 8 divisors (see below), whose sum is σ = 17955936. Its totient is φ = 5735832.

The previous prime is 11721139. The next prime is 11721163. The reversal of 11721142 is 24112711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62253 + ... + 62440.

It is an arithmetic number, because the mean of its divisors is an integer number (2244492).

Almost surely, 2^11721142 is an apocalyptic number.

11721142 is a deficient number, since it is larger than the sum of its proper divisors (6234794).

11721142 is a wasteful number, since it uses less digits than its factorization.

11721142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124742.

The product of its digits is 112, while the sum is 19.

The square root of 11721142 is about 3423.6153405428. The cubic root of 11721142 is about 227.1555274614.

Adding to 11721142 its reverse (24112711), we get a palindrome (35833853).

The spelling of 11721142 in words is "eleven million, seven hundred twenty-one thousand, one hundred forty-two".