158421371 has 2 divisors, whose sum is σ = 158421372. Its totient is φ = 158421370.

The previous prime is 158421323. The next prime is 158421379. The reversal of 158421371 is 173124851.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 158421371 - 2¹⁸ = 158159227 is a prime.

It is not a weakly prime, because it can be changed into another prime (158421379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79210685 + 79210686.

It is an arithmetic number, because the mean of its divisors is an integer number (79210686).

Almost surely, 2^158421371 is an apocalyptic number.

158421371 is a deficient number, since it is larger than the sum of its proper divisors (1).

158421371 is an equidigital number, since it uses as much as digits as its factorization.

158421371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6720, while the sum is 32.

The square root of 158421371 is about 12586.5551681149. Note that the first 3 decimals coincide. The cubic root of 158421371 is about 541.0921779559.

The spelling of 158421371 in words is "one hundred fifty-eight million, four hundred twenty-one thousand, three hundred seventy-one".