126630139 has 2 divisors, whose sum is σ = 126630140. Its totient is φ = 126630138.

The previous prime is 126630137. The next prime is 126630167. The reversal of 126630139 is 931036621.

It is a weak prime.

It is an emirp because it is prime and its reverse (931036621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126630139 - 2¹ = 126630137 is a prime.

Together with 126630137, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 126630139.

It is not a weakly prime, because it can be changed into another prime (126630137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63315069 + 63315070.

It is an arithmetic number, because the mean of its divisors is an integer number (63315070).

Almost surely, 2^126630139 is an apocalyptic number.

126630139 is a deficient number, since it is larger than the sum of its proper divisors (1).

126630139 is an equidigital number, since it uses as much as digits as its factorization.

126630139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 126630139 is about 11253.0057762360. The cubic root of 126630139 is about 502.1641381644.

The spelling of 126630139 in words is "one hundred twenty-six million, six hundred thirty thousand, one hundred thirty-nine".