161125101 has 6 divisors (see below), whose sum is σ = 232736270. Its totient is φ = 107416728.

The previous prime is 161125091. The next prime is 161125103. The reversal of 161125101 is 101521161.

It is a happy number.

161125101 is a `hidden beast` number, since 1 + 611 + 2 + 51 + 0 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 137592900 + 23532201 = 11730^2 + 4851^2 .

It is not a de Polignac number, because 161125101 - 2¹⁵ = 161092333 is a prime.

It is a super-2 number, since 2×161125101² = 51922596344520402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161125103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8951386 + ... + 8951403.

Almost surely, 2^161125101 is an apocalyptic number.

It is an amenable number.

161125101 is a deficient number, since it is larger than the sum of its proper divisors (71611169).

161125101 is a wasteful number, since it uses less digits than its factorization.

161125101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17902795 (or 17902792 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 18.

The square root of 161125101 is about 12693.5062531989. The cubic root of 161125101 is about 544.1530497226.

Adding to 161125101 its reverse (101521161), we get a palindrome (262646262).

The spelling of 161125101 in words is "one hundred sixty-one million, one hundred twenty-five thousand, one hundred one".