126120389 has 2 divisors, whose sum is σ = 126120390. Its totient is φ = 126120388.

The previous prime is 126120377. The next prime is 126120403. The reversal of 126120389 is 983021621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125059489 + 1060900 = 11183^2 + 1030^2 .

It is an emirp because it is prime and its reverse (983021621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126120389 - 2⁸ = 126120133 is a prime.

It is a super-2 number, since 2×126120389² = 31812705043022642, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126120349) 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 as a sum of consecutive naturals, namely, 63060194 + 63060195.

It is an arithmetic number, because the mean of its divisors is an integer number (63060195).

Almost surely, 2^126120389 is an apocalyptic number.

It is an amenable number.

126120389 is a deficient number, since it is larger than the sum of its proper divisors (1).

126120389 is an equidigital number, since it uses as much as digits as its factorization.

126120389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 126120389 is about 11230.3334322717. Note that the first 3 decimals coincide. The cubic root of 126120389 is about 501.4894109049.

The spelling of 126120389 in words is "one hundred twenty-six million, one hundred twenty thousand, three hundred eighty-nine".