4021142 has 4 divisors (see below), whose sum is σ = 6031716. Its totient is φ = 2010570.

The previous prime is 4021099. The next prime is 4021151. The reversal of 4021142 is 2411204.

It is a semiprime because it is the product of two primes.

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, 1005284 + ... + 1005287.

It is an arithmetic number, because the mean of its divisors is an integer number (1507929).

Almost surely, 2^4021142 is an apocalyptic number.

4021142 is a deficient number, since it is larger than the sum of its proper divisors (2010574).

4021142 is a wasteful number, since it uses less digits than its factorization.

4021142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2010573.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 4021142 is about 2005.2785342690. The cubic root of 4021142 is about 159.0192875090.

Adding to 4021142 its reverse (2411204), we get a palindrome (6432346).

The spelling of 4021142 in words is "four million, twenty-one thousand, one hundred forty-two".