2128946 has 4 divisors (see below), whose sum is σ = 3193422. Its totient is φ = 1064472.

The previous prime is 2128933. The next prime is 2128963. The reversal of 2128946 is 6498212.

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., 1755625 + 373321 = 1325^2 + 611^2 .

It is a super-2 number, since 2×2128946² = 9064822141832, which contains 22 as substring.

It is an Ulam number.

It is a plaindrome in base 11.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 532235 + ... + 532238.

2^2128946 is an apocalyptic number.

2128946 is a deficient number, since it is larger than the sum of its proper divisors (1064476).

2128946 is a wasteful number, since it uses less digits than its factorization.

2128946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064475.

The product of its digits is 6912, while the sum is 32.

The square root of 2128946 is about 1459.0908128009. The cubic root of 2128946 is about 128.6436089704.

The spelling of 2128946 in words is "two million, one hundred twenty-eight thousand, nine hundred forty-six".