42124857 has 8 divisors (see below), whose sum is σ = 56797920. Its totient is φ = 27767520.

The previous prime is 42124847. The next prime is 42124867. The reversal of 42124857 is 75842124.

It is an interprime number because it is at equal distance from previous prime (42124847) and next prime (42124867).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42124857 - 2¹⁹ = 41600569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42124847) 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 7 ways as a sum of consecutive naturals, for example, 78619 + ... + 79152.

It is an arithmetic number, because the mean of its divisors is an integer number (7099740).

Almost surely, 2^42124857 is an apocalyptic number.

It is an amenable number.

42124857 is a deficient number, since it is larger than the sum of its proper divisors (14673063).

42124857 is a wasteful number, since it uses less digits than its factorization.

42124857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157863.

The product of its digits is 17920, while the sum is 33.

The square root of 42124857 is about 6490.3664765559. The cubic root of 42124857 is about 347.9467731382.

The spelling of 42124857 in words is "forty-two million, one hundred twenty-four thousand, eight hundred fifty-seven".