105636421 has 8 divisors (see below), whose sum is σ = 116960544. Its totient is φ = 94599120.

The previous prime is 105636413. The next prime is 105636431. The reversal of 105636421 is 124636501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 105636421 - 2³ = 105636413 is a prime.

It is a super-2 number, since 2×105636421² = 22318106883378482, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 105636421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105636431) 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 in 7 ways as a sum of consecutive naturals, for example, 70930 + ... + 72403.

It is an arithmetic number, because the mean of its divisors is an integer number (14620068).

Almost surely, 2^105636421 is an apocalyptic number.

105636421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

105636421 is a deficient number, since it is larger than the sum of its proper divisors (11324123).

105636421 is a wasteful number, since it uses less digits than its factorization.

105636421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143411.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 105636421 is about 10277.9580170382. The cubic root of 105636421 is about 472.7206341535.

The spelling of 105636421 in words is "one hundred five million, six hundred thirty-six thousand, four hundred twenty-one".