161375 has 8 divisors (see below), whose sum is σ = 201552. Its totient is φ = 129000.

The previous prime is 161363. The next prime is 161377. The reversal of 161375 is 573161.

It is not a de Polignac number, because 161375 - 2¹² = 157279 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161375.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161377) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 521 + ... + 770.

It is an arithmetic number, because the mean of its divisors is an integer number (25194).

2¹⁶¹³⁷⁵ is an apocalyptic number.

161375 is a deficient number, since it is larger than the sum of its proper divisors (40177).

161375 is an equidigital number, since it uses as much as digits as its factorization.

161375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1306 (or 1296 counting only the distinct ones).

The product of its digits is 630, while the sum is 23.

The square root of 161375 is about 401.7150731551. The cubic root of 161375 is about 54.4434224745.

The spelling of 161375 in words is "one hundred sixty-one thousand, three hundred seventy-five".