395551 has 4 divisors (see below), whose sum is σ = 425992. Its totient is φ = 365112.

The previous prime is 395543. The next prime is 395581. The reversal of 395551 is 155593.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 395551 - 2³ = 395543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (395581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15201 + ... + 15226.

It is an arithmetic number, because the mean of its divisors is an integer number (106498).

2³⁹⁵⁵⁵¹ is an apocalyptic number.

395551 is a deficient number, since it is larger than the sum of its proper divisors (30441).

395551 is a wasteful number, since it uses less digits than its factorization.

395551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30440.

The product of its digits is 3375, while the sum is 28.

The square root of 395551 is about 628.9284538006. The cubic root of 395551 is about 73.4064399510.

It can be divided in two parts, 395 and 551, that added together give a triangular number (946 = T₄₃).

The spelling of 395551 in words is "three hundred ninety-five thousand, five hundred fifty-one".