126716657 has 8 divisors (see below), whose sum is σ = 137291616. Its totient is φ = 116488512.

The previous prime is 126716641. The next prime is 126716671. The reversal of 126716657 is 756617621.

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 126716657 - 2⁴ = 126716641 is a prime.

It is a super-2 number, since 2×126716657² = 32114222322511298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126716617) 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, 85943 + ... + 87404.

It is an arithmetic number, because the mean of its divisors is an integer number (17161452).

Almost surely, 2^126716657 is an apocalyptic number.

126716657 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

126716657 is a deficient number, since it is larger than the sum of its proper divisors (10574959).

126716657 is a wasteful number, since it uses less digits than its factorization.

126716657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173407.

The product of its digits is 105840, while the sum is 41.

The square root of 126716657 is about 11256.8493371813. The cubic root of 126716657 is about 502.2784773108.

The spelling of 126716657 in words is "one hundred twenty-six million, seven hundred sixteen thousand, six hundred fifty-seven".