161445 has 16 divisors (see below), whose sum is σ = 264960. Its totient is φ = 83904.

The previous prime is 161411. The next prime is 161453. The reversal of 161445 is 544161.

It is not a de Polignac number, because 161445 - 2⁹ = 160933 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 591 + ... + 819.

It is an arithmetic number, because the mean of its divisors is an integer number (16560).

2¹⁶¹⁴⁴⁵ is an apocalyptic number.

161445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161445 is a deficient number, since it is larger than the sum of its proper divisors (103515).

161445 is a wasteful number, since it uses less digits than its factorization.

161445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284.

The product of its digits is 480, while the sum is 21.

The square root of 161445 is about 401.8021901384. The cubic root of 161445 is about 54.4512933522.

It can be divided in two parts, 161 and 445, that added together give a palindrome (606).

The spelling of 161445 in words is "one hundred sixty-one thousand, four hundred forty-five".