381425409 has 16 divisors (see below), whose sum is σ = 565387200. Its totient is φ = 254143008.

The previous prime is 381425357. The next prime is 381425417. The reversal of 381425409 is 904524183.

It is not a de Polignac number, because 381425409 - 2¹³ = 381417217 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (381425449) 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 15 ways as a sum of consecutive naturals, for example, 74277 + ... + 79245.

It is an arithmetic number, because the mean of its divisors is an integer number (35336700).

Almost surely, 2^381425409 is an apocalyptic number.

It is an amenable number.

381425409 is a deficient number, since it is larger than the sum of its proper divisors (183961791).

381425409 is a wasteful number, since it uses less digits than its factorization.

381425409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7821 (or 7815 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 381425409 is about 19530.1154374469. The cubic root of 381425409 is about 725.2201687247.

The spelling of 381425409 in words is "three hundred eighty-one million, four hundred twenty-five thousand, four hundred nine".