164125405 has 4 divisors (see below), whose sum is σ = 196950492. Its totient is φ = 131300320.

The previous prime is 164125399. The next prime is 164125421. The reversal of 164125405 is 504521461.

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 63584676 + 100540729 = 7974^2 + 10027^2 .

It is not a de Polignac number, because 164125405 - 2¹⁵ = 164092637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16412536 + ... + 16412545.

It is an arithmetic number, because the mean of its divisors is an integer number (49237623).

Almost surely, 2^164125405 is an apocalyptic number.

It is an amenable number.

164125405 is a deficient number, since it is larger than the sum of its proper divisors (32825087).

164125405 is an equidigital number, since it uses as much as digits as its factorization.

164125405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32825086.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 164125405 is about 12811.1437818799. The cubic root of 164125405 is about 547.5098501873.

Adding to 164125405 its reverse (504521461), we get a palindrome (668646866).

The spelling of 164125405 in words is "one hundred sixty-four million, one hundred twenty-five thousand, four hundred five".