161547 has 4 divisors (see below), whose sum is σ = 215400. Its totient is φ = 107696.

The previous prime is 161543. The next prime is 161561. The reversal of 161547 is 745161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161547 - 2² = 161543 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (161543) 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, 26922 + ... + 26927.

It is an arithmetic number, because the mean of its divisors is an integer number (53850).

2¹⁶¹⁵⁴⁷ is an apocalyptic number.

161547 is a deficient number, since it is larger than the sum of its proper divisors (53853).

161547 is an equidigital number, since it uses as much as digits as its factorization.

161547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53852.

The product of its digits is 840, while the sum is 24.

The square root of 161547 is about 401.9290982250. The cubic root of 161547 is about 54.4627582735.

It can be divided in two parts, 16154 and 7, that added together give a palindrome (16161).

The spelling of 161547 in words is "one hundred sixty-one thousand, five hundred forty-seven".