161525 has 24 divisors (see below), whose sum is σ = 249984. Its totient is φ = 100800.

The previous prime is 161521. The next prime is 161527. The reversal of 161525 is 525161.

It is not a de Polignac number, because 161525 - 2² = 161521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161497 and 161506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2240 + ... + 2310.

It is an arithmetic number, because the mean of its divisors is an integer number (10416).

2¹⁶¹⁵²⁵ is an apocalyptic number.

It is an amenable number.

161525 is a deficient number, since it is larger than the sum of its proper divisors (88459).

161525 is a wasteful number, since it uses less digits than its factorization.

161525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101 (or 96 counting only the distinct ones).

The product of its digits is 300, while the sum is 20.

The square root of 161525 is about 401.9017292822. The cubic root of 161525 is about 54.4602858557.

Adding to 161525 its reverse (525161), we get a palindrome (686686).

It can be divided in two parts, 161 and 525, that added together give a palindrome (686).

The spelling of 161525 in words is "one hundred sixty-one thousand, five hundred twenty-five".