395621 has 2 divisors, whose sum is σ = 395622. Its totient is φ = 395620.

The previous prime is 395611. The next prime is 395627. The reversal of 395621 is 126593.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 297025 + 98596 = 545^2 + 314^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-395621 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 395621.

It is not a weakly prime, because it can be changed into another prime (395627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197810 + 197811.

It is an arithmetic number, because the mean of its divisors is an integer number (197811).

2³⁹⁵⁶²¹ is an apocalyptic number.

It is an amenable number.

395621 is a deficient number, since it is larger than the sum of its proper divisors (1).

395621 is an equidigital number, since it uses as much as digits as its factorization.

395621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1620, while the sum is 26.

The square root of 395621 is about 628.9841015479. The cubic root of 395621 is about 73.4107699006.

The spelling of 395621 in words is "three hundred ninety-five thousand, six hundred twenty-one".