105421003 has 4 divisors (see below), whose sum is σ = 109056240. Its totient is φ = 101785768.

The previous prime is 105420989. The next prime is 105421007. The reversal of 105421003 is 300124501.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 105421003 - 2¹⁷ = 105289931 is a prime.

It is a super-2 number, since 2×105421003² = 22227175747052018, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 1817575 + ... + 1817632.

It is an arithmetic number, because the mean of its divisors is an integer number (27264060).

Almost surely, 2^105421003 is an apocalyptic number.

105421003 is a deficient number, since it is larger than the sum of its proper divisors (3635237).

105421003 is an equidigital number, since it uses as much as digits as its factorization.

105421003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3635236.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 105421003 is about 10267.4730581580. The cubic root of 105421003 is about 472.3990852298.

Adding to 105421003 its reverse (300124501), we get a palindrome (405545504).

The spelling of 105421003 in words is "one hundred five million, four hundred twenty-one thousand, three".