161282787 has 4 divisors (see below), whose sum is σ = 215043720. Its totient is φ = 107521856.

The previous prime is 161282777. The next prime is 161282837. The reversal of 161282787 is 787282161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161282787 - 2⁸ = 161282531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161282707) 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 3 ways as a sum of consecutive naturals, for example, 26880462 + ... + 26880467.

It is an arithmetic number, because the mean of its divisors is an integer number (53760930).

Almost surely, 2^161282787 is an apocalyptic number.

161282787 is a deficient number, since it is larger than the sum of its proper divisors (53760933).

161282787 is an equidigital number, since it uses as much as digits as its factorization.

161282787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53760932.

The product of its digits is 75264, while the sum is 42.

The square root of 161282787 is about 12699.7160204471. The cubic root of 161282787 is about 544.3305046757.

It can be divided in two parts, 16128 and 2787, that added together give a triangular number (18915 = T₁₉₄).

The spelling of 161282787 in words is "one hundred sixty-one million, two hundred eighty-two thousand, seven hundred eighty-seven".