42036613 has 4 divisors (see below), whose sum is σ = 42422380. Its totient is φ = 41650848.

The previous prime is 42036583. The next prime is 42036623. The reversal of 42036613 is 31663024.

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 38415204 + 3621409 = 6198^2 + 1903^2 .

It is a cyclic number.

It is not a de Polignac number, because 42036613 - 2⁵ = 42036581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42036623) 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, 192720 + ... + 192937.

It is an arithmetic number, because the mean of its divisors is an integer number (10605595).

Almost surely, 2^42036613 is an apocalyptic number.

It is an amenable number.

42036613 is a deficient number, since it is larger than the sum of its proper divisors (385767).

42036613 is a wasteful number, since it uses less digits than its factorization.

42036613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385766.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 42036613 is about 6483.5648373406. The cubic root of 42036613 is about 347.7036413141.

Adding to 42036613 its reverse (31663024), we get a palindrome (73699637).

It can be divided in two parts, 4203 and 6613, that added together give a square (10816 = 104²).

The spelling of 42036613 in words is "forty-two million, thirty-six thousand, six hundred thirteen".