405155161 has 8 divisors (see below), whose sum is σ = 413315784. Its totient is φ = 397013760.

The previous prime is 405155141. The next prime is 405155171. The reversal of 405155161 is 161551504.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 17065161 + 388090000 = 4131^2 + 19700^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 405155161 - 2⁹ = 405154649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405155131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42355 + ... + 51031.

It is an arithmetic number, because the mean of its divisors is an integer number (51664473).

Almost surely, 2^405155161 is an apocalyptic number.

It is an amenable number.

405155161 is a deficient number, since it is larger than the sum of its proper divisors (8160623).

405155161 is an equidigital number, since it uses as much as digits as its factorization.

405155161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9611.

The product of its (nonzero) digits is 3000, while the sum is 28.

The square root of 405155161 is about 20128.4664343809. The cubic root of 405155161 is about 739.9580941694.

The spelling of 405155161 in words is "four hundred five million, one hundred fifty-five thousand, one hundred sixty-one".