126878565 has 32 divisors (see below), whose sum is σ = 234493056. Its totient is φ = 57896960.

The previous prime is 126878551. The next prime is 126878573. The reversal of 126878565 is 565878621.

It is not a de Polignac number, because 126878565 - 2⁵ = 126878533 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19812 + ... + 25421.

It is an arithmetic number, because the mean of its divisors is an integer number (7327908).

Almost surely, 2^126878565 is an apocalyptic number.

126878565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

126878565 is a deficient number, since it is larger than the sum of its proper divisors (107614491).

126878565 is a wasteful number, since it uses less digits than its factorization.

126878565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45269.

The product of its digits is 806400, while the sum is 48.

The square root of 126878565 is about 11264.0385741527. The cubic root of 126878565 is about 502.4923094786.

The spelling of 126878565 in words is "one hundred twenty-six million, eight hundred seventy-eight thousand, five hundred sixty-five".