105212403 has 12 divisors (see below), whose sum is σ = 152120280. Its totient is φ = 70073856.

The previous prime is 105212383. The next prime is 105212479. The reversal of 105212403 is 304212501.

It is not a de Polignac number, because 105212403 - 2⁸ = 105212147 is a prime.

It is a super-2 number, since 2×105212403² = 22139299490068818, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105212803) 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, 5308 + ... + 15446.

It is an arithmetic number, because the mean of its divisors is an integer number (12676690).

Almost surely, 2^105212403 is an apocalyptic number.

105212403 is a deficient number, since it is larger than the sum of its proper divisors (46907877).

105212403 is a wasteful number, since it uses less digits than its factorization.

105212403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11298 (or 11295 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 105212403 is about 10257.3097350134. The cubic root of 105212403 is about 472.0872956297.

Adding to 105212403 its reverse (304212501), we get a palindrome (409424904).

The spelling of 105212403 in words is "one hundred five million, two hundred twelve thousand, four hundred three".