124212105 has 12 divisors (see below), whose sum is σ = 215301060. Its totient is φ = 66246432.

The previous prime is 124212103. The next prime is 124212107. The reversal of 124212105 is 501212421.

It is an interprime number because it is at equal distance from previous prime (124212103) and next prime (124212107).

It can be written as a sum of positive squares in 2 ways, for example, as 28387584 + 95824521 = 5328^2 + 9789^2 .

It is not a de Polignac number, because 124212105 - 2¹ = 124212103 is a prime.

It is not an unprimeable number, because it can be changed into a prime (124212103) 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, 1380090 + ... + 1380179.

It is an arithmetic number, because the mean of its divisors is an integer number (17941755).

Almost surely, 2^124212105 is an apocalyptic number.

124212105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

124212105 is a deficient number, since it is larger than the sum of its proper divisors (91088955).

124212105 is a wasteful number, since it uses less digits than its factorization.

124212105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2760280 (or 2760277 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 124212105 is about 11145.0484521154. The cubic root of 124212105 is about 498.9472583590.

Adding to 124212105 its reverse (501212421), we get a palindrome (625424526).

The spelling of 124212105 in words is "one hundred twenty-four million, two hundred twelve thousand, one hundred five".