42704245 has 4 divisors (see below), whose sum is σ = 51245100. Its totient is φ = 34163392.

The previous prime is 42704243. The next prime is 42704251. The reversal of 42704245 is 54240724.

It is a happy number.

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 4289041 + 38415204 = 2071^2 + 6198^2 .

It is a cyclic number.

It is not a de Polignac number, because 42704245 - 2¹ = 42704243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42704243) 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, 4270420 + ... + 4270429.

It is an arithmetic number, because the mean of its divisors is an integer number (12811275).

Almost surely, 2^42704245 is an apocalyptic number.

It is an amenable number.

42704245 is a deficient number, since it is larger than the sum of its proper divisors (8540855).

42704245 is an equidigital number, since it uses as much as digits as its factorization.

42704245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8540854.

The product of its (nonzero) digits is 8960, while the sum is 28.

The square root of 42704245 is about 6534.8485062777. The cubic root of 42704245 is about 349.5347423477.

Adding to 42704245 its reverse (54240724), we get a palindrome (96944969).

It can be divided in two parts, 4270 and 4245, that added together give a triangular number (8515 = T₁₃₀).

The spelling of 42704245 in words is "forty-two million, seven hundred four thousand, two hundred forty-five".