124405405 has 16 divisors (see below), whose sum is σ = 158750064. Its totient is φ = 93265920.

The previous prime is 124405397. The next prime is 124405423. The reversal of 124405405 is 504504421.

It is a happy number.

124405405 is nontrivially palindromic in base 15.

It can be written as a sum of positive squares in 8 ways, for example, as 23242041 + 101163364 = 4821^2 + 10058^2 .

It is not a de Polignac number, because 124405405 - 2³ = 124405397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 124405405.

It is a congruent 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, 17449 + ... + 23521.

It is an arithmetic number, because the mean of its divisors is an integer number (9921879).

Almost surely, 2^124405405 is an apocalyptic number.

It is an amenable number.

124405405 is a deficient number, since it is larger than the sum of its proper divisors (34344659).

124405405 is a wasteful number, since it uses less digits than its factorization.

124405405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6336.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 124405405 is about 11153.7170934178. The cubic root of 124405405 is about 499.2059462916.

Adding to 124405405 its reverse (504504421), we get a palindrome (628909826).

The spelling of 124405405 in words is "one hundred twenty-four million, four hundred five thousand, four hundred five".