161247 has 8 divisors (see below), whose sum is σ = 218880. Its totient is φ = 105560.

The previous prime is 161237. The next prime is 161263. The reversal of 161247 is 742161.

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

It is a cyclic number.

It is not a de Polignac number, because 161247 - 2¹¹ = 159199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279 + ... + 632.

It is an arithmetic number, because the mean of its divisors is an integer number (27360).

2¹⁶¹²⁴⁷ is an apocalyptic number.

161247 is a deficient number, since it is larger than the sum of its proper divisors (57633).

161247 is an equidigital number, since it uses as much as digits as its factorization.

161247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 973.

The product of its digits is 336, while the sum is 21.

The square root of 161247 is about 401.5557246510. Note that the first 3 decimals coincide. The cubic root of 161247 is about 54.4290241241.

The spelling of 161247 in words is "one hundred sixty-one thousand, two hundred forty-seven".