161187875 has 16 divisors (see below), whose sum is σ = 202631520. Its totient is φ = 128008800.

The previous prime is 161187853. The next prime is 161187877. The reversal of 161187875 is 578781161.

It is not a de Polignac number, because 161187875 - 2⁸ = 161187619 is a prime.

It is a super-3 number, since 3×161187875³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (161187877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12737 + ... + 22013.

It is an arithmetic number, because the mean of its divisors is an integer number (12664470).

Almost surely, 2^161187875 is an apocalyptic number.

161187875 is a deficient number, since it is larger than the sum of its proper divisors (41443645).

161187875 is an equidigital number, since it uses as much as digits as its factorization.

161187875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9431 (or 9421 counting only the distinct ones).

The product of its digits is 94080, while the sum is 44.

The square root of 161187875 is about 12695.9786940590. The cubic root of 161187875 is about 544.2237075080.

The spelling of 161187875 in words is "one hundred sixty-one million, one hundred eighty-seven thousand, eight hundred seventy-five".