161654 has 8 divisors (see below), whose sum is σ = 244728. Its totient is φ = 80080.

The previous prime is 161641. The next prime is 161659. The reversal of 161654 is 456161.

161654 is nontrivially palindromic in base 4.

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

It is a super-2 number, since 2×161654² = 52264031432, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161659) 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, 47 + ... + 570.

It is an arithmetic number, because the mean of its divisors is an integer number (30591).

2¹⁶¹⁶⁵⁴ is an apocalyptic number.

161654 is a deficient number, since it is larger than the sum of its proper divisors (83074).

161654 is a wasteful number, since it uses less digits than its factorization.

161654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750.

The product of its digits is 720, while the sum is 23.

The square root of 161654 is about 402.0621842452. The cubic root of 161654 is about 54.4747800154.

The spelling of 161654 in words is "one hundred sixty-one thousand, six hundred fifty-four".