4245728 has 12 divisors (see below), whose sum is σ = 8358840. Its totient is φ = 2122848.

The previous prime is 4245679. The next prime is 4245743. The reversal of 4245728 is 8275424.

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 132679 = 4245728 / (4 + 2 + 4 + 5 + 7 + 2 + 8).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 4245694 and 4245703.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66308 + ... + 66371.

It is an arithmetic number, because the mean of its divisors is an integer number (696570).

Almost surely, 2^4245728 is an apocalyptic number.

It is an amenable number.

4245728 is a deficient number, since it is larger than the sum of its proper divisors (4113112).

4245728 is a wasteful number, since it uses less digits than its factorization.

4245728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132689 (or 132681 counting only the distinct ones).

The product of its digits is 17920, while the sum is 32.

The square root of 4245728 is about 2060.5164401188. The cubic root of 4245728 is about 161.9262988431.

The spelling of 4245728 in words is "four million, two hundred forty-five thousand, seven hundred twenty-eight".