172405146 has 32 divisors (see below), whose sum is σ = 354613248. Its totient is φ = 55848240.

The previous prime is 172405061. The next prime is 172405147. The reversal of 172405146 is 641504271.

It is not an unprimeable number, because it can be changed into a prime (172405147) 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 15 ways as a sum of consecutive naturals, for example, 52855 + ... + 56021.

It is an arithmetic number, because the mean of its divisors is an integer number (11081664).

Almost surely, 2^172405146 is an apocalyptic number.

172405146 is an abundant number, since it is smaller than the sum of its proper divisors (182208102).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172405146 is a wasteful number, since it uses less digits than its factorization.

172405146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3426.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 172405146 is about 13130.3140099542. The cubic root of 172405146 is about 556.5660888164.

The spelling of 172405146 in words is "one hundred seventy-two million, four hundred five thousand, one hundred forty-six".