161481 has 8 divisors (see below), whose sum is σ = 226720. Its totient is φ = 101952.

The previous prime is 161471. The next prime is 161503. The reversal of 161481 is 184161.

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

It is not a de Polignac number, because 161481 - 2⁹ = 160969 is a prime.

It is a super-2 number, since 2×161481² = 52152226722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 161481.

It is not an unprimeable number, because it can be changed into a prime (161411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1360 + ... + 1473.

It is an arithmetic number, because the mean of its divisors is an integer number (28340).

2¹⁶¹⁴⁸¹ is an apocalyptic number.

It is an amenable number.

161481 is a deficient number, since it is larger than the sum of its proper divisors (65239).

161481 is a wasteful number, since it uses less digits than its factorization.

161481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2855.

The product of its digits is 192, while the sum is 21.

The square root of 161481 is about 401.8469858043. The cubic root of 161481 is about 54.4553403463.

The spelling of 161481 in words is "one hundred sixty-one thousand, four hundred eighty-one".