161025 has 24 divisors (see below), whose sum is σ = 282720. Its totient is φ = 80640.

The previous prime is 161017. The next prime is 161033. The reversal of 161025 is 520161.

It is an interprime number because it is at equal distance from previous prime (161017) and next prime (161033).

It is not a de Polignac number, because 161025 - 2³ = 161017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a nialpdrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 160995 and 161013.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1369 + ... + 1481.

It is an arithmetic number, because the mean of its divisors is an integer number (11780).

161025 is a Friedman number, since it can be written as (10+1)^5-26, using all its digits and the basic arithmetic operations.

2¹⁶¹⁰²⁵ is an apocalyptic number.

161025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161025 is a deficient number, since it is larger than the sum of its proper divisors (121695).

161025 is a wasteful number, since it uses less digits than its factorization.

161025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 161025 is about 401.2792045447. The cubic root of 161025 is about 54.4040339065.

Adding to 161025 its reverse (520161), we get a palindrome (681186).

The spelling of 161025 in words is "one hundred sixty-one thousand, twenty-five".