105026421 has 4 divisors (see below), whose sum is σ = 140035232. Its totient is φ = 70017612.

The previous prime is 105026417. The next prime is 105026423. The reversal of 105026421 is 124620501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 105026421 - 2² = 105026417 is a prime.

It is a super-2 number, since 2×105026421² = 22061098216138482, 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 (105026423) 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 3 ways as a sum of consecutive naturals, for example, 17504401 + ... + 17504406.

It is an arithmetic number, because the mean of its divisors is an integer number (35008808).

Almost surely, 2^105026421 is an apocalyptic number.

It is an amenable number.

105026421 is a deficient number, since it is larger than the sum of its proper divisors (35008811).

105026421 is an equidigital number, since it uses as much as digits as its factorization.

105026421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35008810.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 105026421 is about 10248.2398976605. The cubic root of 105026421 is about 471.8089649330.

Adding to 105026421 its reverse (124620501), we get a palindrome (229646922).

The spelling of 105026421 in words is "one hundred five million, twenty-six thousand, four hundred twenty-one".