2128901 has 4 divisors (see below), whose sum is σ = 2145792. Its totient is φ = 2112012.

The previous prime is 2128891. The next prime is 2128933. The reversal of 2128901 is 1098212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2128901 - 2⁶ = 2128837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2128991) 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, 8255 + ... + 8508.

It is an arithmetic number, because the mean of its divisors is an integer number (536448).

2^2128901 is an apocalyptic number.

It is an amenable number.

2128901 is a deficient number, since it is larger than the sum of its proper divisors (16891).

2128901 is a wasteful number, since it uses less digits than its factorization.

2128901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16890.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 2128901 is about 1459.0753921576. The cubic root of 2128901 is about 128.6427025746.

The spelling of 2128901 in words is "two million, one hundred twenty-eight thousand, nine hundred one".