2128234 has 4 divisors (see below), whose sum is σ = 3192354. Its totient is φ = 1064116.

The previous prime is 2128201. The next prime is 2128241. The reversal of 2128234 is 4328212.

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., 1134225 + 994009 = 1065^2 + 997^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 532057 + ... + 532060.

2^2128234 is an apocalyptic number.

2128234 is a deficient number, since it is larger than the sum of its proper divisors (1064120).

2128234 is a wasteful number, since it uses less digits than its factorization.

2128234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064119.

The product of its digits is 768, while the sum is 22.

The square root of 2128234 is about 1458.8468048428. The cubic root of 2128234 is about 128.6292662765.

Subtracting from 2128234 its sum of digits (22), we obtain a palindrome (2128212).

It can be divided in two parts, 21282 and 34, that added together give a square (21316 = 146²).

The spelling of 2128234 in words is "two million, one hundred twenty-eight thousand, two hundred thirty-four".