42049381 has 8 divisors (see below), whose sum is σ = 48570624. Its totient is φ = 35977920.

The previous prime is 42049379. The next prime is 42049417. The reversal of 42049381 is 18394024.

42049381 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 not a de Polignac number, because 42049381 - 2¹ = 42049379 is a prime.

It is a super-2 number, since 2×42049381² = 3536300884966322, 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 (42049321) 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, 112245 + ... + 112618.

It is an arithmetic number, because the mean of its divisors is an integer number (6071328).

Almost surely, 2^42049381 is an apocalyptic number.

It is an amenable number.

42049381 is a deficient number, since it is larger than the sum of its proper divisors (6521243).

42049381 is a wasteful number, since it uses less digits than its factorization.

42049381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224891.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 42049381 is about 6484.5494060883. The cubic root of 42049381 is about 347.7388410315.

It can be divided in two parts, 420 and 49381, that multiplied together give a triangular number (20740020 = T₆₄₄₀).

The spelling of 42049381 in words is "forty-two million, forty-nine thousand, three hundred eighty-one".