158034421 has 2 divisors, whose sum is σ = 158034422. Its totient is φ = 158034420.

The previous prime is 158034389. The next prime is 158034433. The reversal of 158034421 is 124430851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112996900 + 45037521 = 10630^2 + 6711^2 .

It is a cyclic number.

It is not a de Polignac number, because 158034421 - 2⁵ = 158034389 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 158034421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (158034451) 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, 79017210 + 79017211.

It is an arithmetic number, because the mean of its divisors is an integer number (79017211).

Almost surely, 2^158034421 is an apocalyptic number.

It is an amenable number.

158034421 is a deficient number, since it is larger than the sum of its proper divisors (1).

158034421 is an equidigital number, since it uses as much as digits as its factorization.

158034421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 158034421 is about 12571.1742092773. The cubic root of 158034421 is about 540.6512729656.

The spelling of 158034421 in words is "one hundred fifty-eight million, thirty-four thousand, four hundred twenty-one".