160721287 has 4 divisors (see below), whose sum is σ = 160855000. Its totient is φ = 160587576.

The previous prime is 160721279. The next prime is 160721291. The reversal of 160721287 is 782127061.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 782127061 = 1693 ⋅461977.

It is a cyclic number.

It is not a de Polignac number, because 160721287 - 2³ = 160721279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (160721207) 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 3 ways as a sum of consecutive naturals, for example, 65037 + ... + 67462.

It is an arithmetic number, because the mean of its divisors is an integer number (40213750).

Almost surely, 2^160721287 is an apocalyptic number.

160721287 is a deficient number, since it is larger than the sum of its proper divisors (133713).

160721287 is a wasteful number, since it uses less digits than its factorization.

160721287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133712.

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 160721287 is about 12677.5899523529. The cubic root of 160721287 is about 543.6980814127.

The spelling of 160721287 in words is "one hundred sixty million, seven hundred twenty-one thousand, two hundred eighty-seven".