2128403 has 2 divisors, whose sum is σ = 2128404. Its totient is φ = 2128402.

The previous prime is 2128391. The next prime is 2128409. The reversal of 2128403 is 3048212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2128403 - 2⁴ = 2128387 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2128409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1064201 + 1064202.

It is an arithmetic number, because the mean of its divisors is an integer number (1064202).

2^2128403 is an apocalyptic number.

2128403 is a deficient number, since it is larger than the sum of its proper divisors (1).

2128403 is an equidigital number, since it uses as much as digits as its factorization.

2128403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 2128403 is about 1458.9047261559. The cubic root of 2128403 is about 128.6326709414.

The spelling of 2128403 in words is "two million, one hundred twenty-eight thousand, four hundred three".