4001142 has 8 divisors (see below), whose sum is σ = 8002296. Its totient is φ = 1333712.

The previous prime is 4001141. The next prime is 4001147. The reversal of 4001142 is 2411004.

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

4001142 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4001141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 333423 + ... + 333434.

It is an arithmetic number, because the mean of its divisors is an integer number (1000287).

Almost surely, 2^4001142 is an apocalyptic number.

4001142 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

4001142 is a wasteful number, since it uses less digits than its factorization.

4001142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666862.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 4001142 is about 2000.2854796253. The cubic root of 4001142 is about 158.7552105261.

Adding to 4001142 its reverse (2411004), we get a palindrome (6412146).

The spelling of 4001142 in words is "four million, one thousand, one hundred forty-two".