161285235 has 32 divisors (see below), whose sum is σ = 261930240. Its totient is φ = 84739200.

The previous prime is 161285227. The next prime is 161285237. The reversal of 161285235 is 532582161.

It is not a de Polignac number, because 161285235 - 2³ = 161285227 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161285196 and 161285205.

It is not an unprimeable number, because it can be changed into a prime (161285237) 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 31 ways as a sum of consecutive naturals, for example, 414421 + ... + 414809.

It is an arithmetic number, because the mean of its divisors is an integer number (8185320).

Almost surely, 2^161285235 is an apocalyptic number.

161285235 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161285235 is a deficient number, since it is larger than the sum of its proper divisors (100645005).

161285235 is a wasteful number, since it uses less digits than its factorization.

161285235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739.

The product of its digits is 14400, while the sum is 33.

The square root of 161285235 is about 12699.8124001892. The cubic root of 161285235 is about 544.3332586673. Note that the first 3 decimals are identical.

The spelling of 161285235 in words is "one hundred sixty-one million, two hundred eighty-five thousand, two hundred thirty-five".