126878725 has 24 divisors (see below), whose sum is σ = 160692840. Its totient is φ = 99360000.

The previous prime is 126878707. The next prime is 126878729. The reversal of 126878725 is 527878621.

It can be written as a sum of positive squares in 12 ways, for example, as 6713281 + 120165444 = 2591^2 + 10962^2 .

It is a de Polignac number, because none of the positive numbers 2^k-126878725 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126878729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 274995 + ... + 275455.

It is an arithmetic number, because the mean of its divisors is an integer number (6695535).

Almost surely, 2^126878725 is an apocalyptic number.

It is an amenable number.

126878725 is a deficient number, since it is larger than the sum of its proper divisors (33814115).

126878725 is a wasteful number, since it uses less digits than its factorization.

126878725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681 (or 676 counting only the distinct ones).

The product of its digits is 376320, while the sum is 46.

The square root of 126878725 is about 11264.0456763989. The cubic root of 126878725 is about 502.4925207009.

It can be divided in two parts, 12687 and 8725, that added together give a palindrome (21412).

The spelling of 126878725 in words is "one hundred twenty-six million, eight hundred seventy-eight thousand, seven hundred twenty-five".