161123325 has 72 divisors (see below), whose sum is σ = 307274976. Its totient is φ = 73872000.

The previous prime is 161123311. The next prime is 161123327. The reversal of 161123325 is 523321161.

It is not a de Polignac number, because 161123325 - 2⁴ = 161123309 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 161123295 and 161123304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161123327) by changing a digit.

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 71 ways as a sum of consecutive naturals, for example, 297555 + ... + 298095.

It is an arithmetic number, because the mean of its divisors is an integer number (4267708).

Almost surely, 2^161123325 is an apocalyptic number.

161123325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161123325 is a deficient number, since it is larger than the sum of its proper divisors (146151651).

161123325 is a wasteful number, since it uses less digits than its factorization.

161123325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603 (or 579 counting only the distinct ones).

The product of its digits is 1080, while the sum is 24.

The square root of 161123325 is about 12693.4362959760. The cubic root of 161123325 is about 544.1510504078.

Adding to 161123325 its reverse (523321161), we get a palindrome (684444486).

The spelling of 161123325 in words is "one hundred sixty-one million, one hundred twenty-three thousand, three hundred twenty-five".