126288889 has 2 divisors, whose sum is σ = 126288890. Its totient is φ = 126288888.

The previous prime is 126288821. The next prime is 126288901. The reversal of 126288889 is 988882621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110607289 + 15681600 = 10517^2 + 3960^2 .

It is a cyclic number.

It is not a de Polignac number, because 126288889 - 2²¹ = 124191737 is a prime.

It is not a weakly prime, because it can be changed into another prime (126288809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63144444 + 63144445.

It is an arithmetic number, because the mean of its divisors is an integer number (63144445).

Almost surely, 2^126288889 is an apocalyptic number.

It is an amenable number.

126288889 is a deficient number, since it is larger than the sum of its proper divisors (1).

126288889 is an equidigital number, since it uses as much as digits as its factorization.

126288889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 884736, while the sum is 52.

The square root of 126288889 is about 11237.8329316644. The cubic root of 126288889 is about 501.7126456584.

The spelling of 126288889 in words is "one hundred twenty-six million, two hundred eighty-eight thousand, eight hundred eighty-nine".