395066421 has 6 divisors (see below), whose sum is σ = 570651510. Its totient is φ = 263377608.

The previous prime is 395066407. The next prime is 395066429. The reversal of 395066421 is 124660593.

It is a happy number.

395066421 is a `hidden beast` number, since 3 + 9 + 5 + 0 + 6 + 642 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 239166225 + 155900196 = 15465^2 + 12486^2 .

It is not a de Polignac number, because 395066421 - 2¹⁹ = 394542133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (395066429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21948126 + ... + 21948143.

It is an arithmetic number, because the mean of its divisors is an integer number (95108585).

Almost surely, 2^395066421 is an apocalyptic number.

It is an amenable number.

395066421 is a deficient number, since it is larger than the sum of its proper divisors (175585089).

395066421 is a wasteful number, since it uses less digits than its factorization.

395066421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43896275 (or 43896272 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 395066421 is about 19876.2778457135. The cubic root of 395066421 is about 733.7645160990.

The spelling of 395066421 in words is "three hundred ninety-five million, sixty-six thousand, four hundred twenty-one".