381075745 has 8 divisors (see below), whose sum is σ = 459071784. Its totient is φ = 303673344.

The previous prime is 381075743. The next prime is 381075763. The reversal of 381075745 is 547570183.

It can be written as a sum of positive squares in 4 ways, for example, as 189557824 + 191517921 = 13768^2 + 13839^2 .

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 381075745 - 2¹ = 381075743 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 381075698 and 381075707.

It is not an unprimeable number, because it can be changed into a prime (381075743) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 146994 + ... + 149563.

It is an arithmetic number, because the mean of its divisors is an integer number (57383973).

Almost surely, 2^381075745 is an apocalyptic number.

It is an amenable number.

381075745 is a deficient number, since it is larger than the sum of its proper divisors (77996039).

381075745 is a wasteful number, since it uses less digits than its factorization.

381075745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296819.

The product of its (nonzero) digits is 117600, while the sum is 40.

The square root of 381075745 is about 19521.1614664702. The cubic root of 381075745 is about 724.9984906825.

The spelling of 381075745 in words is "three hundred eighty-one million, seventy-five thousand, seven hundred forty-five".