161607 has 8 divisors (see below), whose sum is σ = 217984. Its totient is φ = 106488.

The previous prime is 161599. The next prime is 161611. The reversal of 161607 is 706161.

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

It is not a de Polignac number, because 161607 - 2³ = 161599 is a prime.

It is a super-2 number, since 2×161607² = 52233644898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48 + ... + 570.

It is an arithmetic number, because the mean of its divisors is an integer number (27248).

2¹⁶¹⁶⁰⁷ is an apocalyptic number.

161607 is a deficient number, since it is larger than the sum of its proper divisors (56377).

161607 is a wasteful number, since it uses less digits than its factorization.

161607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 161607 is about 402.0037313260. The cubic root of 161607 is about 54.4695000907.

Adding to 161607 its reverse (706161), we get a palindrome (867768).

The spelling of 161607 in words is "one hundred sixty-one thousand, six hundred seven".