161572 has 12 divisors (see below), whose sum is σ = 292096. Its totient is φ = 78120.

The previous prime is 161569. The next prime is 161573. The reversal of 161572 is 275161.

161572 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161572² = 52211022368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161573) 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, 528 + ... + 775.

2¹⁶¹⁵⁷² is an apocalyptic number.

It is an amenable number.

161572 is a deficient number, since it is larger than the sum of its proper divisors (130524).

161572 is a wasteful number, since it uses less digits than its factorization.

161572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338 (or 1336 counting only the distinct ones).

The product of its digits is 420, while the sum is 22.

The square root of 161572 is about 401.9601970345. The cubic root of 161572 is about 54.4655675669.

It can be divided in two parts, 16 and 1572, that multiplied together give a palindrome (25152).

The spelling of 161572 in words is "one hundred sixty-one thousand, five hundred seventy-two".