126420289 has 2 divisors, whose sum is σ = 126420290. Its totient is φ = 126420288.

The previous prime is 126420253. The next prime is 126420293. The reversal of 126420289 is 982024621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125619264 + 801025 = 11208^2 + 895^2 .

It is an emirp because it is prime and its reverse (982024621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126420289 - 2²³ = 118031681 is a prime.

It is not a weakly prime, because it can be changed into another prime (126420209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63210144 + 63210145.

It is an arithmetic number, because the mean of its divisors is an integer number (63210145).

Almost surely, 2^126420289 is an apocalyptic number.

It is an amenable number.

126420289 is a deficient number, since it is larger than the sum of its proper divisors (1).

126420289 is an equidigital number, since it uses as much as digits as its factorization.

126420289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 126420289 is about 11243.6777346205. The cubic root of 126420289 is about 501.8865912604.

The spelling of 126420289 in words is "one hundred twenty-six million, four hundred twenty thousand, two hundred eighty-nine".