161386275 has 12 divisors (see below), whose sum is σ = 266825432. Its totient is φ = 86072640.

The previous prime is 161386273. The next prime is 161386289. The reversal of 161386275 is 572683161.

It is not a de Polignac number, because 161386275 - 2¹ = 161386273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161386273) 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, 1075834 + ... + 1075983.

Almost surely, 2^161386275 is an apocalyptic number.

161386275 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161386275 is a deficient number, since it is larger than the sum of its proper divisors (105439157).

161386275 is a wasteful number, since it uses less digits than its factorization.

161386275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2151830 (or 2151825 counting only the distinct ones).

The product of its digits is 60480, while the sum is 39.

The square root of 161386275 is about 12703.7897888780. The cubic root of 161386275 is about 544.4469040181.

The spelling of 161386275 in words is "one hundred sixty-one million, three hundred eighty-six thousand, two hundred seventy-five".