395160581 has 4 divisors (see below), whose sum is σ = 399073164. Its totient is φ = 391248000.

The previous prime is 395160551. The next prime is 395160587. The reversal of 395160581 is 185061593.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 185061593 = 101 ⋅1832293.

It can be written as a sum of positive squares in 2 ways, for example, as 298944100 + 96216481 = 17290^2 + 9809^2 .

It is a cyclic number.

It is not a de Polignac number, because 395160581 - 2⁶ = 395160517 is a prime.

It is a super-2 number, since 2×395160581² = 312303769552515122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (395160587) 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, 1956140 + ... + 1956341.

It is an arithmetic number, because the mean of its divisors is an integer number (99768291).

Almost surely, 2^395160581 is an apocalyptic number.

It is an amenable number.

395160581 is a deficient number, since it is larger than the sum of its proper divisors (3912583).

395160581 is a wasteful number, since it uses less digits than its factorization.

395160581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3912582.

The product of its (nonzero) digits is 32400, while the sum is 38.

The square root of 395160581 is about 19878.6463573353. The cubic root of 395160581 is about 733.8228065322.

The spelling of 395160581 in words is "three hundred ninety-five million, one hundred sixty thousand, five hundred eighty-one".