42430013 has 4 divisors (see below), whose sum is σ = 42464220. Its totient is φ = 42395808.

The previous prime is 42430007. The next prime is 42430019. The reversal of 42430013 is 31003424.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (42430007) and next prime (42430019).

It can be written as a sum of positive squares in 2 ways, for example, as 29019769 + 13410244 = 5387^2 + 3662^2 .

It is a cyclic number.

It is not a de Polignac number, because 42430013 - 2⁴ = 42429997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42429973 and 42430000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42430019) 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, 15170 + ... + 17747.

It is an arithmetic number, because the mean of its divisors is an integer number (10616055).

Almost surely, 2^42430013 is an apocalyptic number.

It is an amenable number.

42430013 is a deficient number, since it is larger than the sum of its proper divisors (34207).

42430013 is a wasteful number, since it uses less digits than its factorization.

42430013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34206.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 42430013 is about 6513.8324356710. The cubic root of 42430013 is about 348.7849376834.

Adding to 42430013 its reverse (31003424), we get a palindrome (73433437).

The spelling of 42430013 in words is "forty-two million, four hundred thirty thousand, thirteen".