42436145 has 4 divisors (see below), whose sum is σ = 50923380. Its totient is φ = 33948912.

The previous prime is 42436129. The next prime is 42436171. The reversal of 42436145 is 54163424.

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 9339136 + 33097009 = 3056^2 + 5753^2 .

It is a cyclic number.

It is not a de Polignac number, because 42436145 - 2⁴ = 42436129 is a prime.

It is a super-2 number, since 2×42436145² = 3601652804922050, which contains 22 as substring.

It is an unprimeable number.

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, 4243610 + ... + 4243619.

It is an arithmetic number, because the mean of its divisors is an integer number (12730845).

Almost surely, 2^42436145 is an apocalyptic number.

It is an amenable number.

42436145 is a deficient number, since it is larger than the sum of its proper divisors (8487235).

42436145 is an equidigital number, since it uses as much as digits as its factorization.

42436145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8487234.

The product of its digits is 11520, while the sum is 29.

The square root of 42436145 is about 6514.3031093126. The cubic root of 42436145 is about 348.8017390469.

Adding to 42436145 its reverse (54163424), we get a palindrome (96599569).

The spelling of 42436145 in words is "forty-two million, four hundred thirty-six thousand, one hundred forty-five".