160921287 has 12 divisors (see below), whose sum is σ = 235716624. Its totient is φ = 105769440.

The previous prime is 160921283. The next prime is 160921289. The reversal of 160921287 is 782129061.

160921287 is a `hidden beast` number, since 1 + 609 + 21 + 28 + 7 = 666.

It is not a de Polignac number, because 160921287 - 2² = 160921283 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (160921283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 125278 + ... + 126555.

It is an arithmetic number, because the mean of its divisors is an integer number (19643052).

Almost surely, 2^160921287 is an apocalyptic number.

160921287 is a deficient number, since it is larger than the sum of its proper divisors (74795337).

160921287 is a wasteful number, since it uses less digits than its factorization.

160921287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251910 (or 251907 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 160921287 is about 12685.4754345275. The cubic root of 160921287 is about 543.9235121249.

The spelling of 160921287 in words is "one hundred sixty million, nine hundred twenty-one thousand, two hundred eighty-seven".