42005013 has 4 divisors (see below), whose sum is σ = 56006688. Its totient is φ = 28003340.

The previous prime is 42004979. The next prime is 42005053. The reversal of 42005013 is 31050024.

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 a de Polignac number, because none of the positive numbers 2^k-42005013 is a prime.

It is a super-2 number, since 2×42005013² = 3528842234260338, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42004983 and 42005001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42005053) 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, 7000833 + ... + 7000838.

It is an arithmetic number, because the mean of its divisors is an integer number (14001672).

Almost surely, 2^42005013 is an apocalyptic number.

It is an amenable number.

42005013 is a deficient number, since it is larger than the sum of its proper divisors (14001675).

42005013 is a wasteful number, since it uses less digits than its factorization.

42005013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14001674.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 42005013 is about 6481.1274482145. The cubic root of 42005013 is about 347.6164935588.

Adding to 42005013 its reverse (31050024), we get a palindrome (73055037).

The spelling of 42005013 in words is "forty-two million, five thousand, thirteen".