381866125 has 32 divisors (see below), whose sum is σ = 500048640. Its totient is φ = 290593600.

The previous prime is 381866099. The next prime is 381866143. The reversal of 381866125 is 521668183.

It is not a de Polignac number, because 381866125 - 2¹³ = 381857933 is a prime.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 911166 + ... + 911584.

It is an arithmetic number, because the mean of its divisors is an integer number (15626520).

Almost surely, 2^381866125 is an apocalyptic number.

It is an amenable number.

381866125 is a deficient number, since it is larger than the sum of its proper divisors (118182515).

381866125 is a wasteful number, since it uses less digits than its factorization.

381866125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774 (or 764 counting only the distinct ones).

The product of its digits is 69120, while the sum is 40.

The square root of 381866125 is about 19541.3951651360. The cubic root of 381866125 is about 725.4993785027.

The spelling of 381866125 in words is "three hundred eighty-one million, eight hundred sixty-six thousand, one hundred twenty-five".