126982171 has 4 divisors (see below), whose sum is σ = 127036512. Its totient is φ = 126927832.

The previous prime is 126982153. The next prime is 126982181. The reversal of 126982171 is 171289621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 171289621 = 461 ⋅371561.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126982171 is a prime.

It is a super-2 number, since 2×126982171² = 32248943503746482, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 126982171.

It is not an unprimeable number, because it can be changed into a prime (126982181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23500 + ... + 28393.

It is an arithmetic number, because the mean of its divisors is an integer number (31759128).

Almost surely, 2^126982171 is an apocalyptic number.

126982171 is a deficient number, since it is larger than the sum of its proper divisors (54341).

126982171 is an equidigital number, since it uses as much as digits as its factorization.

126982171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54340.

The product of its digits is 12096, while the sum is 37.

The square root of 126982171 is about 11268.6366078599. The cubic root of 126982171 is about 502.6290466650.

The spelling of 126982171 in words is "one hundred twenty-six million, nine hundred eighty-two thousand, one hundred seventy-one".