381542871 has 8 divisors (see below), whose sum is σ = 512607744. Its totient is φ = 252419960.

The previous prime is 381542869. The next prime is 381542881. The reversal of 381542871 is 178245183.

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 381542871 - 2¹ = 381542869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381542881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 485031 + ... + 485816.

It is an arithmetic number, because the mean of its divisors is an integer number (64075968).

Almost surely, 2^381542871 is an apocalyptic number.

381542871 is a deficient number, since it is larger than the sum of its proper divisors (131064873).

381542871 is a wasteful number, since it uses less digits than its factorization.

381542871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970981.

The product of its digits is 53760, while the sum is 39.

The square root of 381542871 is about 19533.1224078487. The cubic root of 381542871 is about 725.2946062307.

The spelling of 381542871 in words is "three hundred eighty-one million, five hundred forty-two thousand, eight hundred seventy-one".