381686425 has 12 divisors (see below), whose sum is σ = 484836156. Its totient is φ = 297900800.

The previous prime is 381686423. The next prime is 381686479. The reversal of 381686425 is 524686183.

It can be written as a sum of positive squares in 6 ways, for example, as 22924944 + 358761481 = 4788^2 + 18941^2 .

It is not a de Polignac number, because 381686425 - 2¹ = 381686423 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381686423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 185164 + ... + 187213.

It is an arithmetic number, because the mean of its divisors is an integer number (40403013).

Almost surely, 2^381686425 is an apocalyptic number.

It is an amenable number.

381686425 is a deficient number, since it is larger than the sum of its proper divisors (103149731).

381686425 is a wasteful number, since it uses less digits than its factorization.

381686425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372428 (or 372423 counting only the distinct ones).

The product of its digits is 276480, while the sum is 43.

The square root of 381686425 is about 19536.7966923956. The cubic root of 381686425 is about 725.3855579030.

The spelling of 381686425 in words is "three hundred eighty-one million, six hundred eighty-six thousand, four hundred twenty-five".