164625321 has 16 divisors (see below), whose sum is σ = 257638784. Its totient is φ = 91528704.

The previous prime is 164625313. The next prime is 164625341. The reversal of 164625321 is 123526461.

164625321 = 126² + 127² + ... + 791².

It is not a de Polignac number, because 164625321 - 2³ = 164625313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164625311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105160 + ... + 106713.

It is an arithmetic number, because the mean of its divisors is an integer number (16102424).

Almost surely, 2^164625321 is an apocalyptic number.

It is an amenable number.

164625321 is a deficient number, since it is larger than the sum of its proper divisors (93013463).

164625321 is a wasteful number, since it uses less digits than its factorization.

164625321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211920.

The product of its digits is 8640, while the sum is 30.

The square root of 164625321 is about 12830.6399294813. The cubic root of 164625321 is about 548.0651806338.

The spelling of 164625321 in words is "one hundred sixty-four million, six hundred twenty-five thousand, three hundred twenty-one".