2121142 has 4 divisors (see below), whose sum is σ = 3181716. Its totient is φ = 1060570.

The previous prime is 2121131. The next prime is 2121143. The reversal of 2121142 is 2411212.

It is a happy number.

2121142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530284 + ... + 530287.

It is an arithmetic number, because the mean of its divisors is an integer number (795429).

2^2121142 is an apocalyptic number.

2121142 is a deficient number, since it is larger than the sum of its proper divisors (1060574).

2121142 is a wasteful number, since it uses less digits than its factorization.

2121142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1060573.

The product of its digits is 32, while the sum is 13.

The square root of 2121142 is about 1456.4140894677. The cubic root of 2121142 is about 128.4862284443.

Adding to 2121142 its reverse (2411212), we get a palindrome (4532354).

The spelling of 2121142 in words is "two million, one hundred twenty-one thousand, one hundred forty-two".