103212505 has 16 divisors (see below), whose sum is σ = 136318464. Its totient is φ = 74394880.

The previous prime is 103212493. The next prime is 103212563. The reversal of 103212505 is 505212301.

It is not a de Polignac number, because 103212505 - 2¹³ = 103204313 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2089 + ... + 14518.

It is an arithmetic number, because the mean of its divisors is an integer number (8519904).

Almost surely, 2^103212505 is an apocalyptic number.

It is an amenable number.

103212505 is a deficient number, since it is larger than the sum of its proper divisors (33105959).

103212505 is a wasteful number, since it uses less digits than its factorization.

103212505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16736.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 103212505 is about 10159.3555405843. The cubic root of 103212505 is about 469.0769646515.

Adding to 103212505 its reverse (505212301), we get a palindrome (608424806).

The spelling of 103212505 in words is "one hundred three million, two hundred twelve thousand, five hundred five".