158121071 has 2 divisors, whose sum is σ = 158121072. Its totient is φ = 158121070.

The previous prime is 158121053. The next prime is 158121083. The reversal of 158121071 is 170121851.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 158121071 - 2¹⁸ = 157858927 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 158121071.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (158121371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79060535 + 79060536.

It is an arithmetic number, because the mean of its divisors is an integer number (79060536).

Almost surely, 2^158121071 is an apocalyptic number.

158121071 is a deficient number, since it is larger than the sum of its proper divisors (1).

158121071 is an equidigital number, since it uses as much as digits as its factorization.

158121071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 26.

The square root of 158121071 is about 12574.6201135462. The cubic root of 158121071 is about 540.7500676311.

The spelling of 158121071 in words is "one hundred fifty-eight million, one hundred twenty-one thousand, seventy-one".