126154289 has 2 divisors, whose sum is σ = 126154290. Its totient is φ = 126154288.

The previous prime is 126154247. The next prime is 126154313. The reversal of 126154289 is 982451621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126000625 + 153664 = 11225^2 + 392^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126154289 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (126154489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63077144 + 63077145.

It is an arithmetic number, because the mean of its divisors is an integer number (63077145).

Almost surely, 2^126154289 is an apocalyptic number.

It is an amenable number.

126154289 is a deficient number, since it is larger than the sum of its proper divisors (1).

126154289 is an equidigital number, since it uses as much as digits as its factorization.

126154289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 38.

The square root of 126154289 is about 11231.8426360059. The cubic root of 126154289 is about 501.5343387928.

The spelling of 126154289 in words is "one hundred twenty-six million, one hundred fifty-four thousand, two hundred eighty-nine".