1528397 has 8 divisors (see below), whose sum is σ = 1665720. Its totient is φ = 1393920.

The previous prime is 1528333. The next prime is 1528399. The reversal of 1528397 is 7938251.

It can be written as a sum of positive squares in 4 ways, for example, as 121801 + 1406596 = 349^2 + 1186^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1528397 - 2⁶ = 1528333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1528399) 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 in 7 ways as a sum of consecutive naturals, for example, 497 + ... + 1817.

It is an arithmetic number, because the mean of its divisors is an integer number (208215).

2^1528397 is an apocalyptic number.

It is an amenable number.

1528397 is a deficient number, since it is larger than the sum of its proper divisors (137323).

1528397 is a wasteful number, since it uses less digits than its factorization.

1528397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423.

The product of its digits is 15120, while the sum is 35.

The square root of 1528397 is about 1236.2835435287. The cubic root of 1528397 is about 115.1892787171.

The spelling of 1528397 in words is "one million, five hundred twenty-eight thousand, three hundred ninety-seven".