126505605 has 8 divisors (see below), whose sum is σ = 202408992. Its totient is φ = 67469648.

The previous prime is 126505601. The next prime is 126505607. The reversal of 126505605 is 506505621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 126505605 - 2² = 126505601 is a prime.

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, 4216839 + ... + 4216868.

It is an arithmetic number, because the mean of its divisors is an integer number (25301124).

Almost surely, 2^126505605 is an apocalyptic number.

126505605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

126505605 is a deficient number, since it is larger than the sum of its proper divisors (75903387).

126505605 is an equidigital number, since it uses as much as digits as its factorization.

126505605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8433715.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 126505605 is about 11247.4710490848. The cubic root of 126505605 is about 501.9994669391. Note that the first 3 decimals are identical.

The spelling of 126505605 in words is "one hundred twenty-six million, five hundred five thousand, six hundred five".