42387747 has 4 divisors (see below), whose sum is σ = 56517000. Its totient is φ = 28258496.

The previous prime is 42387743. The next prime is 42387799. The reversal of 42387747 is 74778324.

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

It is a cyclic number.

It is not a de Polignac number, because 42387747 - 2² = 42387743 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42387699 and 42387708.

It is not an unprimeable number, because it can be changed into a prime (42387743) 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, 7064622 + ... + 7064627.

It is an arithmetic number, because the mean of its divisors is an integer number (14129250).

Almost surely, 2^42387747 is an apocalyptic number.

42387747 is a deficient number, since it is larger than the sum of its proper divisors (14129253).

42387747 is a wasteful number, since it uses less digits than its factorization.

42387747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14129252.

The product of its digits is 263424, while the sum is 42.

The square root of 42387747 is about 6510.5873006972. The cubic root of 42387747 is about 348.6690869701.

It can be divided in two parts, 42387 and 747, that added together give a palindrome (43134).

The spelling of 42387747 in words is "forty-two million, three hundred eighty-seven thousand, seven hundred forty-seven".