126781875 has 80 divisors (see below), whose sum is σ = 256417920. Its totient is φ = 61380000.

The previous prime is 126781873. The next prime is 126781877. The reversal of 126781875 is 578187621.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (126781873) and next prime (126781877).

It is not a de Polignac number, because 126781875 - 2¹ = 126781873 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 126781875.

It is not an unprimeable number, because it can be changed into a prime (126781873) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 185284 + ... + 185966.

It is an arithmetic number, because the mean of its divisors is an integer number (3205224).

Almost surely, 2^126781875 is an apocalyptic number.

126781875 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

126781875 is an abundant number, since it is smaller than the sum of its proper divisors (129636045).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

126781875 is an equidigital number, since it uses as much as digits as its factorization.

126781875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723 (or 702 counting only the distinct ones).

The product of its digits is 188160, while the sum is 45.

The square root of 126781875 is about 11259.7457786577. The cubic root of 126781875 is about 502.3646327284.

The spelling of 126781875 in words is "one hundred twenty-six million, seven hundred eighty-one thousand, eight hundred seventy-five".