161860601 has 8 divisors (see below), whose sum is σ = 194719680. Its totient is φ = 131435568.

The previous prime is 161860597. The next prime is 161860603. The reversal of 161860601 is 106068161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161860601 - 2² = 161860597 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161860603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 608366 + ... + 608631.

It is an arithmetic number, because the mean of its divisors is an integer number (24339960).

Almost surely, 2^161860601 is an apocalyptic number.

It is an amenable number.

161860601 is a deficient number, since it is larger than the sum of its proper divisors (32859079).

161860601 is a wasteful number, since it uses less digits than its factorization.

161860601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217023.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 161860601 is about 12722.4447729200. Note that the first 3 decimals coincide. The cubic root of 161860601 is about 544.9797719956.

The spelling of 161860601 in words is "one hundred sixty-one million, eight hundred sixty thousand, six hundred one".