161206525 has 12 divisors (see below), whose sum is σ = 200167744. Its totient is φ = 128790000.

The previous prime is 161206519. The next prime is 161206537. The reversal of 161206525 is 525602161.

It is not a de Polignac number, because 161206525 - 2¹³ = 161198333 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161206493 and 161206502.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 16300 + ... + 24250.

Almost surely, 2^161206525 is an apocalyptic number.

It is an amenable number.

161206525 is a deficient number, since it is larger than the sum of its proper divisors (38961219).

161206525 is an equidigital number, since it uses as much as digits as its factorization.

161206525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8772 (or 8767 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 161206525 is about 12696.7131573490. The cubic root of 161206525 is about 544.2446962263.

Adding to 161206525 its reverse (525602161), we get a palindrome (686808686).

The spelling of 161206525 in words is "one hundred sixty-one million, two hundred six thousand, five hundred twenty-five".