105455421 has 12 divisors (see below), whose sum is σ = 152824672. Its totient is φ = 70072776.

The previous prime is 105455419. The next prime is 105455423. The reversal of 105455421 is 124554501.

105455421 is a `hidden beast` number, since 105 + 4 + 554 + 2 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (105455419) and next prime (105455423).

It is not a de Polignac number, because 105455421 - 2¹ = 105455419 is a prime.

It is a super-2 number, since 2×105455421² = 22241691636574482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105455423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16321 + ... + 21846.

Almost surely, 2^105455421 is an apocalyptic number.

It is an amenable number.

105455421 is a deficient number, since it is larger than the sum of its proper divisors (47369251).

105455421 is a wasteful number, since it uses less digits than its factorization.

105455421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38480 (or 38477 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 105455421 is about 10269.1489910313. The cubic root of 105455421 is about 472.4504894793.

The spelling of 105455421 in words is "one hundred five million, four hundred fifty-five thousand, four hundred twenty-one".