124202005 has 4 divisors (see below), whose sum is σ = 149042412. Its totient is φ = 99361600.

The previous prime is 124202003. The next prime is 124202009. The reversal of 124202005 is 500202421.

124202005 is nontrivially palindromic in base 15.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 51509329 + 72692676 = 7177^2 + 8526^2 .

It is not a de Polignac number, because 124202005 - 2¹ = 124202003 is a prime.

It is a super-2 number, since 2×124202005² = 30852276092040050, which contains 22 as substring.

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 124202005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124202003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12420196 + ... + 12420205.

It is an arithmetic number, because the mean of its divisors is an integer number (37260603).

Almost surely, 2^124202005 is an apocalyptic number.

It is an amenable number.

124202005 is a deficient number, since it is larger than the sum of its proper divisors (24840407).

124202005 is an equidigital number, since it uses as much as digits as its factorization.

124202005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24840406.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 124202005 is about 11144.5953268838. The cubic root of 124202005 is about 498.9337344385.

Adding to 124202005 its reverse (500202421), we get a palindrome (624404426).

The spelling of 124202005 in words is "one hundred twenty-four million, two hundred two thousand, five".