4128539 has 2 divisors, whose sum is σ = 4128540. Its totient is φ = 4128538.

The previous prime is 4128533. The next prime is 4128547. The reversal of 4128539 is 9358214.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4128539 - 2⁸ = 4128283 is a prime.

It is not a weakly prime, because it can be changed into another prime (4128533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2064269 + 2064270.

It is an arithmetic number, because the mean of its divisors is an integer number (2064270).

Almost surely, 2^4128539 is an apocalyptic number.

4128539 is a deficient number, since it is larger than the sum of its proper divisors (1).

4128539 is an equidigital number, since it uses as much as digits as its factorization.

4128539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 32.

The square root of 4128539 is about 2031.8806559441. The cubic root of 4128539 is about 160.4225678907.

It can be divided in two parts, 41285 and 39, that multiplied together give a triangular number (1610115 = T₁₇₉₄).

The spelling of 4128539 in words is "four million, one hundred twenty-eight thousand, five hundred thirty-nine".