2128501 has 2 divisors, whose sum is σ = 2128502. Its totient is φ = 2128500.

The previous prime is 2128493. The next prime is 2128531. The reversal of 2128501 is 1058212.

2128501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2099601 + 28900 = 1449^2 + 170^2 .

It is a cyclic number.

It is not a de Polignac number, because 2128501 - 2³ = 2128493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2128531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1064250 + 1064251.

It is an arithmetic number, because the mean of its divisors is an integer number (1064251).

2^2128501 is an apocalyptic number.

It is an amenable number.

2128501 is a deficient number, since it is larger than the sum of its proper divisors (1).

2128501 is an equidigital number, since it uses as much as digits as its factorization.

2128501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 2128501 is about 1458.9383126095. The cubic root of 2128501 is about 128.6346451615.

The spelling of 2128501 in words is "two million, one hundred twenty-eight thousand, five hundred one".