161575125 has 32 divisors (see below), whose sum is σ = 269702784. Its totient is φ = 85904000.

The previous prime is 161575121. The next prime is 161575133. The reversal of 161575125 is 521575161.

It is a happy number.

It is not a de Polignac number, because 161575125 - 2² = 161575121 is a prime.

It is a super-2 number, since 2×161575125² = 52213042037531250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161575121) 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 31 ways as a sum of consecutive naturals, for example, 194962 + ... + 195788.

It is an arithmetic number, because the mean of its divisors is an integer number (8428212).

Almost surely, 2^161575125 is an apocalyptic number.

161575125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161575125 is a deficient number, since it is larger than the sum of its proper divisors (108127659).

161575125 is an equidigital number, since it uses as much as digits as its factorization.

161575125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1366 (or 1356 counting only the distinct ones).

The product of its digits is 10500, while the sum is 33.

The square root of 161575125 is about 12711.2204370784. The cubic root of 161575125 is about 544.6591870816.

The spelling of 161575125 in words is "one hundred sixty-one million, five hundred seventy-five thousand, one hundred twenty-five".