154682161 has 4 divisors (see below), whose sum is σ = 155021092. Its totient is φ = 154343232.

The previous prime is 154682159. The next prime is 154682191. The reversal of 154682161 is 161286451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 161286451 = 227 ⋅710513.

It can be written as a sum of positive squares in 2 ways, for example, as 121550625 + 33131536 = 11025^2 + 5756^2 .

It is a cyclic number.

It is not a de Polignac number, because 154682161 - 2¹ = 154682159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154682191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168780 + ... + 169693.

It is an arithmetic number, because the mean of its divisors is an integer number (38755273).

Almost surely, 2^154682161 is an apocalyptic number.

It is an amenable number.

154682161 is a deficient number, since it is larger than the sum of its proper divisors (338931).

154682161 is an equidigital number, since it uses as much as digits as its factorization.

154682161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338930.

The product of its digits is 11520, while the sum is 34.

The square root of 154682161 is about 12437.1283261049. The cubic root of 154682161 is about 536.8011162610.

The spelling of 154682161 in words is "one hundred fifty-four million, six hundred eighty-two thousand, one hundred sixty-one".