2128575 has 24 divisors (see below), whose sum is σ = 3566736. Its totient is φ = 1120000.

The previous prime is 2128561. The next prime is 2128591. The reversal of 2128575 is 5758212.

It is not a de Polignac number, because 2128575 - 2⁴ = 2128559 is a prime.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7435 + ... + 7715.

It is an arithmetic number, because the mean of its divisors is an integer number (148614).

2^2128575 is an apocalyptic number.

2128575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2128575 is a deficient number, since it is larger than the sum of its proper divisors (1438161).

2128575 is a wasteful number, since it uses less digits than its factorization.

2128575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395 (or 390 counting only the distinct ones).

The product of its digits is 5600, while the sum is 30.

The square root of 2128575 is about 1458.9636732969. The cubic root of 2128575 is about 128.6361358591.

The spelling of 2128575 in words is "two million, one hundred twenty-eight thousand, five hundred seventy-five".