124290405 has 12 divisors (see below), whose sum is σ = 215436780. Its totient is φ = 66288192.

The previous prime is 124290401. The next prime is 124290449. The reversal of 124290405 is 504092421.

It can be written as a sum of positive squares in 2 ways, for example, as 67272804 + 57017601 = 8202^2 + 7551^2 .

It is not a de Polignac number, because 124290405 - 2² = 124290401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124290401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1380960 + ... + 1381049.

It is an arithmetic number, because the mean of its divisors is an integer number (17953065).

Almost surely, 2^124290405 is an apocalyptic number.

124290405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

124290405 is a deficient number, since it is larger than the sum of its proper divisors (91146375).

124290405 is a wasteful number, since it uses less digits than its factorization.

124290405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2762020 (or 2762017 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 124290405 is about 11148.5606694317. The cubic root of 124290405 is about 499.0520773543.

The spelling of 124290405 in words is "one hundred twenty-four million, two hundred ninety thousand, four hundred five".