42387874 has 4 divisors (see below), whose sum is σ = 63581814. Its totient is φ = 21193936.

The previous prime is 42387871. The next prime is 42387883. The reversal of 42387874 is 47878324.

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

It can be written as a sum of positive squares in only one way, i.e., 38007225 + 4380649 = 6165^2 + 2093^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 42387874.

It is not an unprimeable number, because it can be changed into a prime (42387871) 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 as a sum of consecutive naturals, namely, 10596967 + ... + 10596970.

Almost surely, 2^42387874 is an apocalyptic number.

42387874 is a deficient number, since it is larger than the sum of its proper divisors (21193940).

42387874 is a wasteful number, since it uses less digits than its factorization.

42387874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21193939.

The product of its digits is 301056, while the sum is 43.

The square root of 42387874 is about 6510.5970540343. The cubic root of 42387874 is about 348.6694351913.

The spelling of 42387874 in words is "forty-two million, three hundred eighty-seven thousand, eight hundred seventy-four".