126721143 has 6 divisors (see below), whose sum is σ = 183041664. Its totient is φ = 84480756.

The previous prime is 126721141. The next prime is 126721151. The reversal of 126721143 is 341127621.

It is not a de Polignac number, because 126721143 - 2¹ = 126721141 is a prime.

It is a super-3 number, since 3×126721143³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126721141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7040055 + ... + 7040072.

It is an arithmetic number, because the mean of its divisors is an integer number (30506944).

Almost surely, 2^126721143 is an apocalyptic number.

126721143 is a deficient number, since it is larger than the sum of its proper divisors (56320521).

126721143 is a wasteful number, since it uses less digits than its factorization.

126721143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14080133 (or 14080130 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 126721143 is about 11257.0485918823. The cubic root of 126721143 is about 502.2844044312.

Adding to 126721143 its reverse (341127621), we get a palindrome (467848764).

The spelling of 126721143 in words is "one hundred twenty-six million, seven hundred twenty-one thousand, one hundred forty-three".