42078149 has 8 divisors (see below), whose sum is σ = 43040472. Its totient is φ = 41126400.

The previous prime is 42078143. The next prime is 42078161. The reversal of 42078149 is 94187024.

It can be written as a sum of positive squares in 4 ways, for example, as 3265249 + 38812900 = 1807^2 + 6230^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42078149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42078143) 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, 5699 + ... + 10799.

It is an arithmetic number, because the mean of its divisors is an integer number (5380059).

Almost surely, 2^42078149 is an apocalyptic number.

It is an amenable number.

42078149 is a deficient number, since it is larger than the sum of its proper divisors (962323).

42078149 is a wasteful number, since it uses less digits than its factorization.

42078149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5287.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 42078149 is about 6486.7672225848. The cubic root of 42078149 is about 347.8181245648.

The spelling of 42078149 in words is "forty-two million, seventy-eight thousand, one hundred forty-nine".