1528239 has 4 divisors (see below), whose sum is σ = 2037656. Its totient is φ = 1018824.

The previous prime is 1528237. The next prime is 1528243. The reversal of 1528239 is 9328251.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1528239 - 2¹ = 1528237 is a prime.

It is a super-2 number, since 2×1528239² = 4671028882242, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1528237) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 254704 + ... + 254709.

It is an arithmetic number, because the mean of its divisors is an integer number (509414).

2^1528239 is an apocalyptic number.

1528239 is a deficient number, since it is larger than the sum of its proper divisors (509417).

1528239 is an equidigital number, since it uses as much as digits as its factorization.

1528239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509416.

The product of its digits is 4320, while the sum is 30.

The square root of 1528239 is about 1236.2196406788. The cubic root of 1528239 is about 115.1853093005.

The spelling of 1528239 in words is "one million, five hundred twenty-eight thousand, two hundred thirty-nine".