126505606 has 16 divisors (see below), whose sum is σ = 196979328. Its totient is φ = 60868800.

The previous prime is 126505601. The next prime is 126505607. The reversal of 126505606 is 606505621.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126505601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5586 + ... + 16858.

It is an arithmetic number, because the mean of its divisors is an integer number (12311208).

Almost surely, 2^126505606 is an apocalyptic number.

126505606 is a deficient number, since it is larger than the sum of its proper divisors (70473722).

126505606 is a wasteful number, since it uses less digits than its factorization.

126505606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11487.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 126505606 is about 11247.4710935392. The cubic root of 126505606 is about 501.9994682618. Note that the first 3 decimals are identical.

The spelling of 126505606 in words is "one hundred twenty-six million, five hundred five thousand, six hundred six".