42405013 has 4 divisors (see below), whose sum is σ = 48462880. Its totient is φ = 36347148.

The previous prime is 42404983. The next prime is 42405023. The reversal of 42405013 is 31050424.

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 42405013 - 2¹⁷ = 42273941 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 (42405023) 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, 3028923 + ... + 3028936.

It is an arithmetic number, because the mean of its divisors is an integer number (12115720).

Almost surely, 2^42405013 is an apocalyptic number.

It is an amenable number.

42405013 is a deficient number, since it is larger than the sum of its proper divisors (6057867).

42405013 is an equidigital number, since it uses as much as digits as its factorization.

42405013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6057866.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 42405013 is about 6511.9131597404. The cubic root of 42405013 is about 348.7164222157.

Adding to 42405013 its reverse (31050424), we get a palindrome (73455437).

The spelling of 42405013 in words is "forty-two million, four hundred five thousand, thirteen".