126306405 has 16 divisors (see below), whose sum is σ = 224544960. Its totient is φ = 67363344.

The previous prime is 126306403. The next prime is 126306407. The reversal of 126306405 is 504603621.

126306405 is a `hidden beast` number, since 12 + 6 + 3 + 0 + 640 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (126306403) and next prime (126306407).

It is not a de Polignac number, because 126306405 - 2¹ = 126306403 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126306403) 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, 467667 + ... + 467936.

It is an arithmetic number, because the mean of its divisors is an integer number (14034060).

Almost surely, 2^126306405 is an apocalyptic number.

126306405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

126306405 is a deficient number, since it is larger than the sum of its proper divisors (98238555).

126306405 is an equidigital number, since it uses as much as digits as its factorization.

126306405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 935617 (or 935611 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 126306405 is about 11238.6122363929. The cubic root of 126306405 is about 501.7358400780.

The spelling of 126306405 in words is "one hundred twenty-six million, three hundred six thousand, four hundred five".