164721001 has 8 divisors (see below), whose sum is σ = 166630464. Its totient is φ = 162817200.

The previous prime is 164720989. The next prime is 164721017. The reversal of 164721001 is 100127461.

164721001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 164721001 - 2²¹ = 162623849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164721071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88260 + ... + 90106.

It is an arithmetic number, because the mean of its divisors is an integer number (20828808).

Almost surely, 2^164721001 is an apocalyptic number.

It is an amenable number.

164721001 is a deficient number, since it is larger than the sum of its proper divisors (1909463).

164721001 is a wasteful number, since it uses less digits than its factorization.

164721001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2831.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 164721001 is about 12834.3679626229. The cubic root of 164721001 is about 548.1713383020.

Adding to 164721001 its reverse (100127461), we get a palindrome (264848462).

The spelling of 164721001 in words is "one hundred sixty-four million, seven hundred twenty-one thousand, one".