42736013 has 4 divisors (see below), whose sum is σ = 42906528. Its totient is φ = 42565500.

The previous prime is 42736009. The next prime is 42736027. The reversal of 42736013 is 31063724.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42736013 - 2² = 42736009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42736003) 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, 84881 + ... + 85382.

It is an arithmetic number, because the mean of its divisors is an integer number (10726632).

Almost surely, 2^42736013 is an apocalyptic number.

It is an amenable number.

42736013 is a deficient number, since it is larger than the sum of its proper divisors (170515).

42736013 is a wasteful number, since it uses less digits than its factorization.

42736013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170514.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 42736013 is about 6537.2787151842. The cubic root of 42736013 is about 349.6213946808.

Adding to 42736013 its reverse (31063724), we get a palindrome (73799737).

The spelling of 42736013 in words is "forty-two million, seven hundred thirty-six thousand, thirteen".