126145889 has 8 divisors (see below), whose sum is σ = 130052328. Its totient is φ = 122279040.

The previous prime is 126145879. The next prime is 126145897. The reversal of 126145889 is 988541621.

It can be written as a sum of positive squares in 4 ways, for example, as 369664 + 125776225 = 608^2 + 11215^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 126145889 - 2⁸ = 126145633 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (126145849) 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 in 7 ways as a sum of consecutive naturals, for example, 3362 + ... + 16235.

It is an arithmetic number, because the mean of its divisors is an integer number (16256541).

Almost surely, 2^126145889 is an apocalyptic number.

It is an amenable number.

126145889 is a deficient number, since it is larger than the sum of its proper divisors (3906439).

126145889 is a wasteful number, since it uses less digits than its factorization.

126145889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19795.

The product of its digits is 138240, while the sum is 44.

The square root of 126145889 is about 11231.4686929181. The cubic root of 126145889 is about 501.5232069689.

The spelling of 126145889 in words is "one hundred twenty-six million, one hundred forty-five thousand, eight hundred eighty-nine".