161406875 has 40 divisors (see below), whose sum is σ = 233925120. Its totient is φ = 109044000.

The previous prime is 161406859. The next prime is 161406877. The reversal of 161406875 is 578604161.

It is not a de Polignac number, because 161406875 - 2⁴ = 161406859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161406877) 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 39 ways as a sum of consecutive naturals, for example, 345392 + ... + 345858.

It is an arithmetic number, because the mean of its divisors is an integer number (5848128).

Almost surely, 2^161406875 is an apocalyptic number.

161406875 is a deficient number, since it is larger than the sum of its proper divisors (72518245).

161406875 is an frugal number, since it uses more digits than its factorization.

161406875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573 (or 558 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 161406875 is about 12704.6005446846. The cubic root of 161406875 is about 544.4700681710.

The spelling of 161406875 in words is "one hundred sixty-one million, four hundred six thousand, eight hundred seventy-five".