161055129 has 4 divisors (see below), whose sum is σ = 214740176. Its totient is φ = 107370084.

The previous prime is 161055121. The next prime is 161055133. The reversal of 161055129 is 921550161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 161055129 - 2³ = 161055121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 161055096 and 161055105.

It is not an unprimeable number, because it can be changed into a prime (161055121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26842519 + ... + 26842524.

It is an arithmetic number, because the mean of its divisors is an integer number (53685044).

Almost surely, 2^161055129 is an apocalyptic number.

It is an amenable number.

161055129 is a deficient number, since it is larger than the sum of its proper divisors (53685047).

161055129 is an equidigital number, since it uses as much as digits as its factorization.

161055129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53685046.

The product of its (nonzero) digits is 2700, while the sum is 30.

The square root of 161055129 is about 12690.7497414455. The cubic root of 161055129 is about 544.0742683078.

The spelling of 161055129 in words is "one hundred sixty-one million, fifty-five thousand, one hundred twenty-nine".