42450013 has 4 divisors (see below), whose sum is σ = 42887740. Its totient is φ = 42012288.

The previous prime is 42450007. The next prime is 42450017. The reversal of 42450013 is 31005424.

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 28708164 + 13741849 = 5358^2 + 3707^2 .

It is a cyclic number.

It is not a de Polignac number, because 42450013 - 2²¹ = 40352861 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 (42450017) 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, 218718 + ... + 218911.

It is an arithmetic number, because the mean of its divisors is an integer number (10721935).

Almost surely, 2^42450013 is an apocalyptic number.

It is an amenable number.

42450013 is a deficient number, since it is larger than the sum of its proper divisors (437727).

42450013 is an equidigital number, since it uses as much as digits as its factorization.

42450013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437726.

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

The square root of 42450013 is about 6515.3674493462. The cubic root of 42450013 is about 348.8397306826.

Adding to 42450013 its reverse (31005424), we get a palindrome (73455437).

The spelling of 42450013 in words is "forty-two million, four hundred fifty thousand, thirteen".