126878573 has 2 divisors, whose sum is σ = 126878574. Its totient is φ = 126878572.

The previous prime is 126878551. The next prime is 126878579. The reversal of 126878573 is 375878621.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125037124 + 1841449 = 11182^2 + 1357^2 .

It is a cyclic number.

It is not a de Polignac number, because 126878573 - 2⁸ = 126878317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126878579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63439286 + 63439287.

It is an arithmetic number, because the mean of its divisors is an integer number (63439287).

Almost surely, 2^126878573 is an apocalyptic number.

It is an amenable number.

126878573 is a deficient number, since it is larger than the sum of its proper divisors (1).

126878573 is an equidigital number, since it uses as much as digits as its factorization.

126878573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 47.

The square root of 126878573 is about 11264.0389292651. The cubic root of 126878573 is about 502.4923200397.

The spelling of 126878573 in words is "one hundred twenty-six million, eight hundred seventy-eight thousand, five hundred seventy-three".