161269375 has 10 divisors (see below), whose sum is σ = 201522992. Its totient is φ = 129015000.

The previous prime is 161269373. The next prime is 161269391. The reversal of 161269375 is 573962161.

It is not a de Polignac number, because 161269375 - 2¹ = 161269373 is a prime.

It is a super-2 number, since 2×161269375² = 52015622625781250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161269373) 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 9 ways as a sum of consecutive naturals, for example, 128391 + ... + 129640.

Almost surely, 2^161269375 is an apocalyptic number.

161269375 is a deficient number, since it is larger than the sum of its proper divisors (40253617).

161269375 is an frugal number, since it uses more digits than its factorization.

161269375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258051 (or 258036 counting only the distinct ones).

The product of its digits is 68040, while the sum is 40.

The square root of 161269375 is about 12699.1879661654. The cubic root of 161269375 is about 544.3154157269.

The spelling of 161269375 in words is "one hundred sixty-one million, two hundred sixty-nine thousand, three hundred seventy-five".