42615245 has 4 divisors (see below), whose sum is σ = 51138300. Its totient is φ = 34092192.

The previous prime is 42615241. The next prime is 42615259. The reversal of 42615245 is 54251624.

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 16370116 + 26245129 = 4046^2 + 5123^2 .

It is a cyclic number.

It is not a de Polignac number, because 42615245 - 2² = 42615241 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42615241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4261520 + ... + 4261529.

It is an arithmetic number, because the mean of its divisors is an integer number (12784575).

Almost surely, 2^42615245 is an apocalyptic number.

It is an amenable number.

42615245 is a deficient number, since it is larger than the sum of its proper divisors (8523055).

42615245 is an equidigital number, since it uses as much as digits as its factorization.

42615245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8523054.

The product of its digits is 9600, while the sum is 29.

The square root of 42615245 is about 6528.0353093408. The cubic root of 42615245 is about 349.2917514516.

Adding to 42615245 its reverse (54251624), we get a palindrome (96866869).

The spelling of 42615245 in words is "forty-two million, six hundred fifteen thousand, two hundred forty-five".