161428 has 6 divisors (see below), whose sum is σ = 282506. Its totient is φ = 80712.

The previous prime is 161411. The next prime is 161453. The reversal of 161428 is 824161.

161428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 94864 + 66564 = 308^2 + 258^2 .

It is a junction number, because it is equal to n+sod(n) for n = 161399 and 161408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20175 + ... + 20182.

2¹⁶¹⁴²⁸ is an apocalyptic number.

It is an amenable number.

161428 is a deficient number, since it is larger than the sum of its proper divisors (121078).

161428 is a wasteful number, since it uses less digits than its factorization.

161428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40361 (or 40359 counting only the distinct ones).

The product of its digits is 384, while the sum is 22.

The square root of 161428 is about 401.7810348934. The cubic root of 161428 is about 54.4493820626.

Adding to 161428 its reverse (824161), we get a palindrome (985589).

It can be divided in two parts, 16 and 1428, that added together give a square (1444 = 38²).

The spelling of 161428 in words is "one hundred sixty-one thousand, four hundred twenty-eight".