2128577 has 4 divisors (see below), whose sum is σ = 2322096. Its totient is φ = 1935060.

The previous prime is 2128561. The next prime is 2128591. The reversal of 2128577 is 7758212.

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 2128577 - 2⁴ = 2128561 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2128547) 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, 96743 + ... + 96764.

It is an arithmetic number, because the mean of its divisors is an integer number (580524).

2^2128577 is an apocalyptic number.

It is an amenable number.

2128577 is a deficient number, since it is larger than the sum of its proper divisors (193519).

2128577 is a wasteful number, since it uses less digits than its factorization.

2128577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193518.

The product of its digits is 7840, while the sum is 32.

The square root of 2128577 is about 1458.9643587148. The cubic root of 2128577 is about 128.6361761477.

The spelling of 2128577 in words is "two million, one hundred twenty-eight thousand, five hundred seventy-seven".