1528729 has 8 divisors (see below), whose sum is σ = 1592960. Its totient is φ = 1465776.

The previous prime is 1528717. The next prime is 1528733. The reversal of 1528729 is 9278251.

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 1528729 - 2⁵ = 1528697 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1528694 and 1528703.

It is not an unprimeable number, because it can be changed into a prime (1528789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2662 + ... + 3184.

It is an arithmetic number, because the mean of its divisors is an integer number (199120).

2^1528729 is an apocalyptic number.

It is an amenable number.

1528729 is a deficient number, since it is larger than the sum of its proper divisors (64231).

1528729 is an equidigital number, since it uses as much as digits as its factorization.

1528729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639.

The product of its digits is 10080, while the sum is 34.

The square root of 1528729 is about 1236.4178096420. The cubic root of 1528729 is about 115.1976186252.

It can be divided in two parts, 152872 and 9, that added together give a square (152881 = 391²).

The spelling of 1528729 in words is "one million, five hundred twenty-eight thousand, seven hundred twenty-nine".