126102005 has 16 divisors (see below), whose sum is σ = 165751920. Its totient is φ = 91671552.

The previous prime is 126102001. The next prime is 126102023. The reversal of 126102005 is 500201621.

It can be written as a sum of positive squares in 8 ways, for example, as 23059204 + 103042801 = 4802^2 + 10151^2 .

It is not a de Polignac number, because 126102005 - 2² = 126102001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126102001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23114 + ... + 28043.

It is an arithmetic number, because the mean of its divisors is an integer number (10359495).

Almost surely, 2^126102005 is an apocalyptic number.

It is an amenable number.

126102005 is a deficient number, since it is larger than the sum of its proper divisors (39649915).

126102005 is a wasteful number, since it uses less digits than its factorization.

126102005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51208.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 126102005 is about 11229.5149049280. The cubic root of 126102005 is about 501.4650431047.

Adding to 126102005 its reverse (500201621), we get a palindrome (626303626).

The spelling of 126102005 in words is "one hundred twenty-six million, one hundred two thousand, five".