161497 has 4 divisors (see below), whose sum is σ = 184576. Its totient is φ = 138420.

The previous prime is 161471. The next prime is 161503. The reversal of 161497 is 794161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161407) by changing a digit.

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, 11529 + ... + 11542.

It is an arithmetic number, because the mean of its divisors is an integer number (46144).

2¹⁶¹⁴⁹⁷ is an apocalyptic number.

It is an amenable number.

161497 is a deficient number, since it is larger than the sum of its proper divisors (23079).

161497 is an equidigital number, since it uses as much as digits as its factorization.

161497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23078.

The product of its digits is 1512, while the sum is 28.

The square root of 161497 is about 401.8668933864. The cubic root of 161497 is about 54.4571388173.

It can be divided in two parts, 1614 and 97, that added together give a triangular number (1711 = T₅₈).

The spelling of 161497 in words is "one hundred sixty-one thousand, four hundred ninety-seven".