2142242 has 4 divisors (see below), whose sum is σ = 3213366. Its totient is φ = 1071120.

The previous prime is 2142241. The next prime is 2142251. The reversal of 2142242 is 2422412.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 1990921 + 151321 = 1411^2 + 389^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2142242.

It is not an unprimeable number, because it can be changed into a prime (2142241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 535559 + ... + 535562.

2^2142242 is an apocalyptic number.

2142242 is a deficient number, since it is larger than the sum of its proper divisors (1071124).

2142242 is a wasteful number, since it uses less digits than its factorization.

2142242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071123.

The product of its digits is 256, while the sum is 17.

The square root of 2142242 is about 1463.6399830559. The cubic root of 2142242 is about 128.9108612406.

Adding to 2142242 its reverse (2422412), we get a palindrome (4564654).

The spelling of 2142242 in words is "two million, one hundred forty-two thousand, two hundred forty-two".