1528139 has 2 divisors, whose sum is σ = 1528140. Its totient is φ = 1528138.

The previous prime is 1528127. The next prime is 1528141. The reversal of 1528139 is 9318251.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1528139 - 2¹⁶ = 1462603 is a prime.

Together with 1528141, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1528199) 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, 764069 + 764070.

It is an arithmetic number, because the mean of its divisors is an integer number (764070).

2^1528139 is an apocalyptic number.

1528139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1528139 is an equidigital number, since it uses as much as digits as its factorization.

1528139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 29.

The square root of 1528139 is about 1236.1791941300. The cubic root of 1528139 is about 115.1827968701.

The spelling of 1528139 in words is "one million, five hundred twenty-eight thousand, one hundred thirty-nine".