106171421 has 2 divisors, whose sum is σ = 106171422. Its totient is φ = 106171420.

The previous prime is 106171379. The next prime is 106171489. The reversal of 106171421 is 124171601.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83265625 + 22905796 = 9125^2 + 4786^2 .

It is a cyclic number.

It is not a de Polignac number, because 106171421 - 2¹⁴ = 106155037 is a prime.

It is a super-2 number, since 2×106171421² = 22544741274318482, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (106171321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53085710 + 53085711.

It is an arithmetic number, because the mean of its divisors is an integer number (53085711).

Almost surely, 2^106171421 is an apocalyptic number.

It is an amenable number.

106171421 is a deficient number, since it is larger than the sum of its proper divisors (1).

106171421 is an equidigital number, since it uses as much as digits as its factorization.

106171421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 106171421 is about 10303.9517176664. The cubic root of 106171421 is about 473.5173283995.

The spelling of 106171421 in words is "one hundred six million, one hundred seventy-one thousand, four hundred twenty-one".