161321147 has 12 divisors (see below), whose sum is σ = 179413200. Its totient is φ = 144881568.

The previous prime is 161321131. The next prime is 161321161. The reversal of 161321147 is 741123161.

It is not a de Polignac number, because 161321147 - 2⁴ = 161321131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161320147) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6647 + ... + 19152.

It is an arithmetic number, because the mean of its divisors is an integer number (14951100).

Almost surely, 2^161321147 is an apocalyptic number.

161321147 is a deficient number, since it is larger than the sum of its proper divisors (18092053).

161321147 is a wasteful number, since it uses less digits than its factorization.

161321147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25862 (or 25849 counting only the distinct ones).

The product of its digits is 1008, while the sum is 26.

The square root of 161321147 is about 12701.2262006469. The cubic root of 161321147 is about 544.3736563418.

The spelling of 161321147 in words is "one hundred sixty-one million, three hundred twenty-one thousand, one hundred forty-seven".