161586325 has 12 divisors (see below), whose sum is σ = 201530628. Its totient is φ = 128518400.

The previous prime is 161586323. The next prime is 161586367. The reversal of 161586325 is 523685161.

It can be written as a sum of positive squares in 6 ways, for example, as 6185169 + 155401156 = 2487^2 + 12466^2 .

It is not a de Polignac number, because 161586325 - 2¹ = 161586323 is a prime.

It is a super-2 number, since 2×161586325² = 52220280854011250, 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 (161586323) 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 11 ways as a sum of consecutive naturals, for example, 14356 + ... + 23005.

It is an arithmetic number, because the mean of its divisors is an integer number (16794219).

Almost surely, 2^161586325 is an apocalyptic number.

It is an amenable number.

161586325 is a deficient number, since it is larger than the sum of its proper divisors (39944303).

161586325 is a wasteful number, since it uses less digits than its factorization.

161586325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37544 (or 37539 counting only the distinct ones).

The product of its digits is 43200, while the sum is 37.

The square root of 161586325 is about 12711.6609850955. The cubic root of 161586325 is about 544.6717716135.

The spelling of 161586325 in words is "one hundred sixty-one million, five hundred eighty-six thousand, three hundred twenty-five".