161612 has 12 divisors (see below), whose sum is σ = 308616. Its totient is φ = 73440.

The previous prime is 161611. The next prime is 161627. The reversal of 161612 is 216161.

It is a happy number.

It is a super-2 number, since 2×161612² = 52236877088, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (161611) 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, 1793 + ... + 1880.

It is an arithmetic number, because the mean of its divisors is an integer number (25718).

2¹⁶¹⁶¹² is an apocalyptic number.

It is an amenable number.

161612 is a deficient number, since it is larger than the sum of its proper divisors (147004).

161612 is a wasteful number, since it uses less digits than its factorization.

161612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3688 (or 3686 counting only the distinct ones).

The product of its digits is 72, while the sum is 17.

The square root of 161612 is about 402.0099501256. The cubic root of 161612 is about 54.4700618335.

Adding to 161612 its reverse (216161), we get a palindrome (377773).

The spelling of 161612 in words is "one hundred sixty-one thousand, six hundred twelve".