100671421 has 2 divisors, whose sum is σ = 100671422. Its totient is φ = 100671420.

The previous prime is 100671409. The next prime is 100671427. The reversal of 100671421 is 124176001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96727225 + 3944196 = 9835^2 + 1986^2 .

It is a cyclic number.

It is not a de Polignac number, because 100671421 - 2¹³ = 100663229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100671392 and 100671401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100671427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50335710 + 50335711.

It is an arithmetic number, because the mean of its divisors is an integer number (50335711).

Almost surely, 2^100671421 is an apocalyptic number.

It is an amenable number.

100671421 is a deficient number, since it is larger than the sum of its proper divisors (1).

100671421 is an equidigital number, since it uses as much as digits as its factorization.

100671421 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 22.

The square root of 100671421 is about 10033.5148876154. The cubic root of 100671421 is about 465.1953871150.

It can be divided in two parts, 1006 and 71421, that added together give a palindrome (72427).

The spelling of 100671421 in words is "one hundred million, six hundred seventy-one thousand, four hundred twenty-one".