158120971 has 4 divisors (see below), whose sum is σ = 158147872. Its totient is φ = 158094072.

The previous prime is 158120953. The next prime is 158120981. The reversal of 158120971 is 179021851.

It is a happy number.

158120971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 179021851 = 181 ⋅989071.

It is a cyclic number.

It is not a de Polignac number, because 158120971 - 2⁷ = 158120843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158120981) 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, 435 + ... + 17788.

It is an arithmetic number, because the mean of its divisors is an integer number (39536968).

Almost surely, 2^158120971 is an apocalyptic number.

158120971 is a deficient number, since it is larger than the sum of its proper divisors (26901).

158120971 is an equidigital number, since it uses as much as digits as its factorization.

158120971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26900.

The product of its (nonzero) digits is 5040, while the sum is 34.

The square root of 158120971 is about 12574.6161372823. The cubic root of 158120971 is about 540.7499536361.

The spelling of 158120971 in words is "one hundred fifty-eight million, one hundred twenty thousand, nine hundred seventy-one".