105051421 has 2 divisors, whose sum is σ = 105051422. Its totient is φ = 105051420.

The previous prime is 105051403. The next prime is 105051431. The reversal of 105051421 is 124150501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98604900 + 6446521 = 9930^2 + 2539^2 .

It is a cyclic number.

It is not a de Polignac number, because 105051421 - 2⁷ = 105051293 is a prime.

It is a super-2 number, since 2×105051421² = 22071602108238482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105051431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52525710 + 52525711.

It is an arithmetic number, because the mean of its divisors is an integer number (52525711).

Almost surely, 2^105051421 is an apocalyptic number.

It is an amenable number.

105051421 is a deficient number, since it is larger than the sum of its proper divisors (1).

105051421 is an equidigital number, since it uses as much as digits as its factorization.

105051421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 105051421 is about 10249.4595467273. The cubic root of 105051421 is about 471.8463976991.

It can be divided in two parts, 10 and 5051421, that added together give a triangular number (5051431 = T₃₁₇₈).

The spelling of 105051421 in words is "one hundred five million, fifty-one thousand, four hundred twenty-one".