126857629 has 4 divisors (see below), whose sum is σ = 131232060. Its totient is φ = 122483200.

The previous prime is 126857593. The next prime is 126857641. The reversal of 126857629 is 926758621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 926758621 = 17 ⋅54515213.

It can be written as a sum of positive squares in 2 ways, for example, as 26316900 + 100540729 = 5130^2 + 10027^2 .

It is a cyclic number.

It is not a de Polignac number, because 126857629 - 2²¹ = 124760477 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 (126857329) 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 3 ways as a sum of consecutive naturals, for example, 2187172 + ... + 2187229.

It is an arithmetic number, because the mean of its divisors is an integer number (32808015).

Almost surely, 2^126857629 is an apocalyptic number.

It is an amenable number.

126857629 is a deficient number, since it is larger than the sum of its proper divisors (4374431).

126857629 is an equidigital number, since it uses as much as digits as its factorization.

126857629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4374430.

The product of its digits is 362880, while the sum is 46.

The square root of 126857629 is about 11263.1092066090. The cubic root of 126857629 is about 502.4646695126.

The spelling of 126857629 in words is "one hundred twenty-six million, eight hundred fifty-seven thousand, six hundred twenty-nine".