126403905 has 16 divisors (see below), whose sum is σ = 202461120. Its totient is φ = 67343808.

The previous prime is 126403897. The next prime is 126403913. The reversal of 126403905 is 509304621.

It is an interprime number because it is at equal distance from previous prime (126403897) and next prime (126403913).

It is not a de Polignac number, because 126403905 - 2³ = 126403897 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12094 + ... + 19976.

It is an arithmetic number, because the mean of its divisors is an integer number (12653820).

Almost surely, 2^126403905 is an apocalyptic number.

126403905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

126403905 is a deficient number, since it is larger than the sum of its proper divisors (76057215).

126403905 is a wasteful number, since it uses less digits than its factorization.

126403905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8960.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 126403905 is about 11242.9491237842. The cubic root of 126403905 is about 501.8649089149.

The spelling of 126403905 in words is "one hundred twenty-six million, four hundred three thousand, nine hundred five".