158380121 has 2 divisors, whose sum is σ = 158380122. Its totient is φ = 158380120.

The previous prime is 158380111. The next prime is 158380127. The reversal of 158380121 is 121083851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 142539721 + 15840400 = 11939^2 + 3980^2 .

It is a cyclic number.

It is not a de Polignac number, because 158380121 - 2¹⁰ = 158379097 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (158380127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79190060 + 79190061.

It is an arithmetic number, because the mean of its divisors is an integer number (79190061).

Almost surely, 2^158380121 is an apocalyptic number.

It is an amenable number.

158380121 is a deficient number, since it is larger than the sum of its proper divisors (1).

158380121 is an equidigital number, since it uses as much as digits as its factorization.

158380121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 158380121 is about 12584.9164081451. The cubic root of 158380121 is about 541.0452104083.

The spelling of 158380121 in words is "one hundred fifty-eight million, three hundred eighty thousand, one hundred twenty-one".