2121238 has 8 divisors (see below), whose sum is σ = 3636432. Its totient is φ = 909096.

The previous prime is 2121199. The next prime is 2121239. The reversal of 2121238 is 8321212.

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

It is a super-3 number, since 3×2121238³ = 28634489853339759816, which contains 333 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75745 + ... + 75772.

It is an arithmetic number, because the mean of its divisors is an integer number (454554).

2^2121238 is an apocalyptic number.

2121238 is a deficient number, since it is larger than the sum of its proper divisors (1515194).

2121238 is a wasteful number, since it uses less digits than its factorization.

2121238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151526.

The product of its digits is 192, while the sum is 19.

The square root of 2121238 is about 1456.4470467545. The cubic root of 2121238 is about 128.4881667857.

The spelling of 2121238 in words is "two million, one hundred twenty-one thousand, two hundred thirty-eight".