42457381 has 8 divisors (see below), whose sum is σ = 47321280. Its totient is φ = 37856448.

The previous prime is 42457357. The next prime is 42457417. The reversal of 42457381 is 18375424.

42457381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 42457381 - 2⁷ = 42457253 is a prime.

It is a super-2 number, since 2×42457381² = 3605258402758322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42457301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65401 + ... + 66046.

It is an arithmetic number, because the mean of its divisors is an integer number (5915160).

Almost surely, 2^42457381 is an apocalyptic number.

It is an amenable number.

42457381 is a deficient number, since it is larger than the sum of its proper divisors (4863899).

42457381 is a wasteful number, since it uses less digits than its factorization.

42457381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131483.

The product of its digits is 26880, while the sum is 34.

The square root of 42457381 is about 6515.9328572354. The cubic root of 42457381 is about 348.8599120855.

The spelling of 42457381 in words is "forty-two million, four hundred fifty-seven thousand, three hundred eighty-one".