382148721 has 6 divisors (see below), whose sum is σ = 551992610. Its totient is φ = 254765808.

The previous prime is 382148719. The next prime is 382148743. The reversal of 382148721 is 127841283.

It can be written as a sum of positive squares in only one way, i.e., 359481600 + 22667121 = 18960^2 + 4761^2 .

It is not a de Polignac number, because 382148721 - 2¹ = 382148719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (382148761) 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 5 ways as a sum of consecutive naturals, for example, 21230476 + ... + 21230493.

Almost surely, 2^382148721 is an apocalyptic number.

It is an amenable number.

382148721 is a deficient number, since it is larger than the sum of its proper divisors (169843889).

382148721 is a wasteful number, since it uses less digits than its factorization.

382148721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42460975 (or 42460972 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 382148721 is about 19548.6245296184. The cubic root of 382148721 is about 725.6783004290.

The spelling of 382148721 in words is "three hundred eighty-two million, one hundred forty-eight thousand, seven hundred twenty-one".