10105421 has 2 divisors, whose sum is σ = 10105422. Its totient is φ = 10105420.

The previous prime is 10105391. The next prime is 10105451. The reversal of 10105421 is 12450101.

It is a balanced prime because it is at equal distance from previous prime (10105391) and next prime (10105451).

It can be written as a sum of positive squares in only one way, i.e., 7590025 + 2515396 = 2755^2 + 1586^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10105421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10105396 and 10105405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10105451) 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, 5052710 + 5052711.

It is an arithmetic number, because the mean of its divisors is an integer number (5052711).

Almost surely, 2^10105421 is an apocalyptic number.

It is an amenable number.

10105421 is a deficient number, since it is larger than the sum of its proper divisors (1).

10105421 is an equidigital number, since it uses as much as digits as its factorization.

10105421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 10105421 is about 3178.9024835625. The cubic root of 10105421 is about 216.1978996186.

Adding to 10105421 its reverse (12450101), we get a palindrome (22555522).

The spelling of 10105421 in words is "ten million, one hundred five thousand, four hundred twenty-one".