42176381 has 4 divisors (see below), whose sum is σ = 45420732. Its totient is φ = 38932032.

The previous prime is 42176369. The next prime is 42176389. The reversal of 42176381 is 18367124.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19945156 + 22231225 = 4466^2 + 4715^2 .

It is a cyclic number.

It is not a de Polignac number, because 42176381 - 2¹⁸ = 41914237 is a prime.

It is a super-2 number, since 2×42176381² = 3557694228514322, 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 (42176389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1622156 + ... + 1622181.

It is an arithmetic number, because the mean of its divisors is an integer number (11355183).

Almost surely, 2^42176381 is an apocalyptic number.

It is an amenable number.

42176381 is a deficient number, since it is larger than the sum of its proper divisors (3244351).

42176381 is a wasteful number, since it uses less digits than its factorization.

42176381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3244350.

The product of its digits is 8064, while the sum is 32.

The square root of 42176381 is about 6494.3345309585. The cubic root of 42176381 is about 348.0885762329.

The spelling of 42176381 in words is "forty-two million, one hundred seventy-six thousand, three hundred eighty-one".