161227125 has 128 divisors (see below), whose sum is σ = 325877760. Its totient is φ = 78408000.

The previous prime is 161227057. The next prime is 161227139. The reversal of 161227125 is 521722161.

161227125 is a `hidden beast` number, since 1 + 612 + 27 + 1 + 25 = 666.

It is not a de Polignac number, because 161227125 - 2²⁰ = 160178549 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2406342 + ... + 2406408.

It is an arithmetic number, because the mean of its divisors is an integer number (2545920).

Almost surely, 2^161227125 is an apocalyptic number.

161227125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161227125 is an abundant number, since it is smaller than the sum of its proper divisors (164650635).

161227125 is a wasteful number, since it uses less digits than its factorization.

161227125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145 (or 129 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 161227125 is about 12697.5243650091. The cubic root of 161227125 is about 544.2678775941.

Adding to 161227125 its reverse (521722161), we get a palindrome (682949286).

The spelling of 161227125 in words is "one hundred sixty-one million, two hundred twenty-seven thousand, one hundred twenty-five".