126505567 has 4 divisors (see below), whose sum is σ = 126536800. Its totient is φ = 126474336.

The previous prime is 126505559. The next prime is 126505571. The reversal of 126505567 is 765505621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 126505567 - 2³ = 126505559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126505597) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8442 + ... + 18007.

It is an arithmetic number, because the mean of its divisors is an integer number (31634200).

Almost surely, 2^126505567 is an apocalyptic number.

126505567 is a deficient number, since it is larger than the sum of its proper divisors (31233).

126505567 is an equidigital number, since it uses as much as digits as its factorization.

126505567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31232.

The product of its (nonzero) digits is 63000, while the sum is 37.

The square root of 126505567 is about 11247.4693598160. The cubic root of 126505567 is about 501.9994166752. Note that the first 3 decimals are identical.

The spelling of 126505567 in words is "one hundred twenty-six million, five hundred five thousand, five hundred sixty-seven".