126811405 has 32 divisors (see below), whose sum is σ = 179306496. Its totient is φ = 84297024.

The previous prime is 126811387. The next prime is 126811417. The reversal of 126811405 is 504118621.

It is not a de Polignac number, because 126811405 - 2¹¹ = 126809357 is a prime.

It is a super-2 number, since 2×126811405² = 32162264876148050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 208612 + ... + 209218.

It is an arithmetic number, because the mean of its divisors is an integer number (5603328).

Almost surely, 2^126811405 is an apocalyptic number.

It is an amenable number.

126811405 is a deficient number, since it is larger than the sum of its proper divisors (52495091).

126811405 is a wasteful number, since it uses less digits than its factorization.

126811405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 126811405 is about 11261.0570107783. The cubic root of 126811405 is about 502.4036332453.

The spelling of 126811405 in words is "one hundred twenty-six million, eight hundred eleven thousand, four hundred five".