161871301 has 4 divisors (see below), whose sum is σ = 167453100. Its totient is φ = 156289504.

The previous prime is 161871293. The next prime is 161871313. The reversal of 161871301 is 103178161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 93412225 + 68459076 = 9665^2 + 8274^2 .

It is a cyclic number.

It is not a de Polignac number, because 161871301 - 2³ = 161871293 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 161871301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161871341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2790856 + ... + 2790913.

It is an arithmetic number, because the mean of its divisors is an integer number (41863275).

Almost surely, 2^161871301 is an apocalyptic number.

It is an amenable number.

161871301 is a deficient number, since it is larger than the sum of its proper divisors (5581799).

161871301 is an equidigital number, since it uses as much as digits as its factorization.

161871301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5581798.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 161871301 is about 12722.8652826319. The cubic root of 161871301 is about 544.9917805903.

The spelling of 161871301 in words is "one hundred sixty-one million, eight hundred seventy-one thousand, three hundred one".