126405005 has 16 divisors (see below), whose sum is σ = 160942080. Its totient is φ = 95038272.

The previous prime is 126405001. The next prime is 126405029. The reversal of 126405005 is 500504621.

It is a cyclic number.

It is not a de Polignac number, because 126405005 - 2² = 126405001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126405001) 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 15 ways as a sum of consecutive naturals, for example, 6827 + ... + 17303.

It is an arithmetic number, because the mean of its divisors is an integer number (10058880).

Almost surely, 2^126405005 is an apocalyptic number.

It is an amenable number.

126405005 is a deficient number, since it is larger than the sum of its proper divisors (34537075).

126405005 is a wasteful number, since it uses less digits than its factorization.

126405005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10628.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 126405005 is about 11242.9980432267. The cubic root of 126405005 is about 501.8663646974.

Adding to 126405005 its reverse (500504621), we get a palindrome (626909626).

It can be divided in two parts, 12640500 and 5, that multiplied together give a square (63202500 = 7950²).

The spelling of 126405005 in words is "one hundred twenty-six million, four hundred five thousand, five".