42412387 has 4 divisors (see below), whose sum is σ = 42425856. Its totient is φ = 42398920.

The previous prime is 42412379. The next prime is 42412393. The reversal of 42412387 is 78321424.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 42412387 - 2³ = 42412379 is a prime.

It is a super-3 number, since 3×42412387³ (a number of 24 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42412367) 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, 798 + ... + 9244.

It is an arithmetic number, because the mean of its divisors is an integer number (10606464).

Almost surely, 2^42412387 is an apocalyptic number.

42412387 is a deficient number, since it is larger than the sum of its proper divisors (13469).

42412387 is an equidigital number, since it uses as much as digits as its factorization.

42412387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13468.

The product of its digits is 10752, while the sum is 31.

The square root of 42412387 is about 6512.4793281822. The cubic root of 42412387 is about 348.7366343374.

The spelling of 42412387 in words is "forty-two million, four hundred twelve thousand, three hundred eighty-seven".