105421005 has 24 divisors (see below), whose sum is σ = 183081600. Its totient is φ = 56116320.

The previous prime is 105420989. The next prime is 105421007. The reversal of 105421005 is 500124501.

It is not a de Polignac number, because 105421005 - 2⁴ = 105420989 is a prime.

It is a super-2 number, since 2×105421005² = 22227176590420050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105421007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25000 + ... + 28910.

It is an arithmetic number, because the mean of its divisors is an integer number (7628400).

Almost surely, 2^105421005 is an apocalyptic number.

105421005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

105421005 is a deficient number, since it is larger than the sum of its proper divisors (77660595).

105421005 is a wasteful number, since it uses less digits than its factorization.

105421005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4521 (or 4518 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 105421005 is about 10267.4731555529. The cubic root of 105421005 is about 472.3990882172.

Adding to 105421005 its reverse (500124501), we get a palindrome (605545506).

The spelling of 105421005 in words is "one hundred five million, four hundred twenty-one thousand, five".