42742124 has 12 divisors (see below), whose sum is σ = 74892384. Its totient is φ = 21344304.

The previous prime is 42742111. The next prime is 42742127. The reversal of 42742124 is 42124724.

It is a junction number, because it is equal to n+sod(n) for n = 42742093 and 42742102.

It is not an unprimeable number, because it can be changed into a prime (42742127) 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, 2852 + ... + 9675.

It is an arithmetic number, because the mean of its divisors is an integer number (6241032).

Almost surely, 2^42742124 is an apocalyptic number.

It is an amenable number.

42742124 is a deficient number, since it is larger than the sum of its proper divisors (32150260).

42742124 is a wasteful number, since it uses less digits than its factorization.

42742124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13384 (or 13382 counting only the distinct ones).

The product of its digits is 3584, while the sum is 26.

The square root of 42742124 is about 6537.7460947944. The cubic root of 42742124 is about 349.6380584916.

Adding to 42742124 its reverse (42124724), we get a palindrome (84866848).

The spelling of 42742124 in words is "forty-two million, seven hundred forty-two thousand, one hundred twenty-four".