164302121 has 4 divisors (see below), whose sum is σ = 164668500. Its totient is φ = 163935744.

The previous prime is 164302091. The next prime is 164302123. The reversal of 164302121 is 121203461.

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 131354521 + 32947600 = 11461^2 + 5740^2 .

It is a cyclic number.

It is not a de Polignac number, because 164302121 - 2²² = 160107817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 164302093 and 164302102.

It is not an unprimeable number, because it can be changed into a prime (164302123) 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 3 ways as a sum of consecutive naturals, for example, 182516 + ... + 183413.

It is an arithmetic number, because the mean of its divisors is an integer number (41167125).

Almost surely, 2^164302121 is an apocalyptic number.

It is an amenable number.

164302121 is a deficient number, since it is larger than the sum of its proper divisors (366379).

164302121 is an equidigital number, since it uses as much as digits as its factorization.

164302121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366378.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 164302121 is about 12818.0388905636. The cubic root of 164302121 is about 547.7062834088.

Adding to 164302121 its reverse (121203461), we get a palindrome (285505582).

The spelling of 164302121 in words is "one hundred sixty-four million, three hundred two thousand, one hundred twenty-one".