4528729 has 4 divisors (see below), whose sum is σ = 4583376. Its totient is φ = 4474084.

The previous prime is 4528721. The next prime is 4528751. The reversal of 4528729 is 9278254.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9278254 = 2 ⋅4639127.

It is a cyclic number.

It is not a de Polignac number, because 4528729 - 2³ = 4528721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4528721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27199 + ... + 27364.

It is an arithmetic number, because the mean of its divisors is an integer number (1145844).

Almost surely, 2^4528729 is an apocalyptic number.

It is an amenable number.

4528729 is a deficient number, since it is larger than the sum of its proper divisors (54647).

4528729 is an equidigital number, since it uses as much as digits as its factorization.

4528729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54646.

The product of its digits is 40320, while the sum is 37.

The square root of 4528729 is about 2128.0810604862. The cubic root of 4528729 is about 165.4469547022.

The spelling of 4528729 in words is "four million, five hundred twenty-eight thousand, seven hundred twenty-nine".