158967121 has 2 divisors, whose sum is σ = 158967122. Its totient is φ = 158967120.

The previous prime is 158967089. The next prime is 158967131. The reversal of 158967121 is 121769851.

It is a happy number.

158967121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157854096 + 1113025 = 12564^2 + 1055^2 .

It is a cyclic number.

It is not a de Polignac number, because 158967121 - 2⁵ = 158967089 is a prime.

It is not a weakly prime, because it can be changed into another prime (158967131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79483560 + 79483561.

It is an arithmetic number, because the mean of its divisors is an integer number (79483561).

Almost surely, 2^158967121 is an apocalyptic number.

It is an amenable number.

158967121 is a deficient number, since it is larger than the sum of its proper divisors (1).

158967121 is an equidigital number, since it uses as much as digits as its factorization.

158967121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 40.

The square root of 158967121 is about 12608.2164083585. The cubic root of 158967121 is about 541.7128067783.

The spelling of 158967121 in words is "one hundred fifty-eight million, nine hundred sixty-seven thousand, one hundred twenty-one".