381860521 has 8 divisors (see below), whose sum is σ = 438851520. Its totient is φ = 325479408.

The previous prime is 381860509. The next prime is 381860527. The reversal of 381860521 is 125068183.

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 381860521 - 2⁷ = 381860393 is a prime.

It is a super-3 number, since 3×381860521³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381860527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151126 + ... + 153631.

It is an arithmetic number, because the mean of its divisors is an integer number (54856440).

Almost surely, 2^381860521 is an apocalyptic number.

It is an amenable number.

381860521 is a deficient number, since it is larger than the sum of its proper divisors (56990999).

381860521 is a wasteful number, since it uses less digits than its factorization.

381860521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304943.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 381860521 is about 19541.2517766903. The cubic root of 381860521 is about 725.4958295116.

The spelling of 381860521 in words is "three hundred eighty-one million, eight hundred sixty thousand, five hundred twenty-one".