161582 has 8 divisors (see below), whose sum is σ = 244296. Its totient is φ = 80152.

The previous prime is 161573. The next prime is 161591. The reversal of 161582 is 285161.

It is an interprime number because it is at equal distance from previous prime (161573) and next prime (161591).

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

It is a super-2 number, since 2×161582² = 52217485448, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113 + ... + 579.

It is an arithmetic number, because the mean of its divisors is an integer number (30537).

2¹⁶¹⁵⁸² is an apocalyptic number.

161582 is a deficient number, since it is larger than the sum of its proper divisors (82714).

161582 is a wasteful number, since it uses less digits than its factorization.

161582 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642.

The product of its digits is 480, while the sum is 23.

The square root of 161582 is about 401.9726358846. The cubic root of 161582 is about 54.4666912031.

The spelling of 161582 in words is "one hundred sixty-one thousand, five hundred eighty-two".