2121242 has 4 divisors (see below), whose sum is σ = 3181866. Its totient is φ = 1060620.

The previous prime is 2121241. The next prime is 2121253. The reversal of 2121242 is 2421212.

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 + 130321 = 1411^2 + 361^2 .

It is not an unprimeable number, because it can be changed into a prime (2121241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530309 + ... + 530312.

2^2121242 is an apocalyptic number.

2121242 is a deficient number, since it is larger than the sum of its proper divisors (1060624).

2121242 is a wasteful number, since it uses less digits than its factorization.

2121242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1060623.

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

The square root of 2121242 is about 1456.4484199586. The cubic root of 2121242 is about 128.4882475487.

Adding to 2121242 its reverse (2421212), we get a palindrome (4542454).

The spelling of 2121242 in words is "two million, one hundred twenty-one thousand, two hundred forty-two".