158956129 has 4 divisors (see below), whose sum is σ = 159615940. Its totient is φ = 158296320.

The previous prime is 158956087. The next prime is 158956157. The reversal of 158956129 is 921659851.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 921659851 = 7 ⋅131665693.

It can be written as a sum of positive squares in 2 ways, for example, as 146894400 + 12061729 = 12120^2 + 3473^2 .

It is a cyclic number.

It is not a de Polignac number, because 158956129 - 2¹⁹ = 158431841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158956159) 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, 329544 + ... + 330025.

It is an arithmetic number, because the mean of its divisors is an integer number (39903985).

Almost surely, 2^158956129 is an apocalyptic number.

It is an amenable number.

158956129 is a deficient number, since it is larger than the sum of its proper divisors (659811).

158956129 is an equidigital number, since it uses as much as digits as its factorization.

158956129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659810.

The product of its digits is 194400, while the sum is 46.

The square root of 158956129 is about 12607.7804945994. The cubic root of 158956129 is about 541.7003206651.

The spelling of 158956129 in words is "one hundred fifty-eight million, nine hundred fifty-six thousand, one hundred twenty-nine".