161028125 has 18 divisors (see below), whose sum is σ = 202162842. Its totient is φ = 128255000.

The previous prime is 161028121. The next prime is 161028139. The reversal of 161028125 is 521820161.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 3 ways, for example, as 74407876 + 86620249 = 8626^2 + 9307^2 .

It is not a de Polignac number, because 161028125 - 2² = 161028121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161028094 and 161028103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161028121) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 709262 + ... + 709488.

It is an arithmetic number, because the mean of its divisors is an integer number (11231269).

Almost surely, 2^161028125 is an apocalyptic number.

It is an amenable number.

161028125 is a deficient number, since it is larger than the sum of its proper divisors (41134717).

161028125 is an frugal number, since it uses more digits than its factorization.

161028125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 161028125 is about 12689.6857723113. The cubic root of 161028125 is about 544.0438584251.

Adding to 161028125 its reverse (521820161), we get a palindrome (682848286).

The spelling of 161028125 in words is "one hundred sixty-one million, twenty-eight thousand, one hundred twenty-five".