395242549 has 4 divisors (see below), whose sum is σ = 425645836. Its totient is φ = 364839264.

The previous prime is 395242543. The next prime is 395242559. The reversal of 395242549 is 945242593.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19580625 + 375661924 = 4425^2 + 19382^2 .

It is a cyclic number.

It is not a de Polignac number, because 395242549 - 2¹¹ = 395240501 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 (395242543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15201624 + ... + 15201649.

It is an arithmetic number, because the mean of its divisors is an integer number (106411459).

Almost surely, 2^395242549 is an apocalyptic number.

It is an amenable number.

395242549 is a deficient number, since it is larger than the sum of its proper divisors (30403287).

395242549 is a wasteful number, since it uses less digits than its factorization.

395242549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30403286.

The product of its digits is 388800, while the sum is 43.

The square root of 395242549 is about 19880.7079602312. The cubic root of 395242549 is about 733.8735418807.

The spelling of 395242549 in words is "three hundred ninety-five million, two hundred forty-two thousand, five hundred forty-nine".