395577121 has 4 divisors (see below), whose sum is σ = 395661700. Its totient is φ = 395492544.

The previous prime is 395577089. The next prime is 395577137. The reversal of 395577121 is 121775593.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121775593 = 23 ⋅5294591.

It can be written as a sum of positive squares in 2 ways, for example, as 183467025 + 212110096 = 13545^2 + 14564^2 .

It is a cyclic number.

It is not a de Polignac number, because 395577121 - 2⁵ = 395577089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (395574121) 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, 34836 + ... + 44773.

It is an arithmetic number, because the mean of its divisors is an integer number (98915425).

Almost surely, 2^395577121 is an apocalyptic number.

It is an amenable number.

395577121 is a deficient number, since it is larger than the sum of its proper divisors (84579).

395577121 is an equidigital number, since it uses as much as digits as its factorization.

395577121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84578.

The product of its digits is 66150, while the sum is 40.

The square root of 395577121 is about 19889.1206693509. The cubic root of 395577121 is about 734.0805576238.

The spelling of 395577121 in words is "three hundred ninety-five million, five hundred seventy-seven thousand, one hundred twenty-one".