42528245 has 4 divisors (see below), whose sum is σ = 51033900. Its totient is φ = 34022592.

The previous prime is 42528221. The next prime is 42528253. The reversal of 42528245 is 54282524.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9878449 + 32649796 = 3143^2 + 5714^2 .

It is a cyclic number.

It is not a de Polignac number, because 42528245 - 2¹⁶ = 42462709 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4252820 + ... + 4252829.

It is an arithmetic number, because the mean of its divisors is an integer number (12758475).

Almost surely, 2^42528245 is an apocalyptic number.

It is an amenable number.

42528245 is a deficient number, since it is larger than the sum of its proper divisors (8505655).

42528245 is an equidigital number, since it uses as much as digits as its factorization.

42528245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8505654.

The product of its digits is 25600, while the sum is 32.

The square root of 42528245 is about 6521.3683380101. The cubic root of 42528245 is about 349.0538938071.

The spelling of 42528245 in words is "forty-two million, five hundred twenty-eight thousand, two hundred forty-five".