125711780 has 12 divisors (see below), whose sum is σ = 263994780. Its totient is φ = 50284704.

The previous prime is 125711779. The next prime is 125711783. The reversal of 125711780 is 87117521.

It can be written as a sum of positive squares in 2 ways, for example, as 72012196 + 53699584 = 8486^2 + 7328^2 .

It is not an unprimeable number, because it can be changed into a prime (125711783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3142775 + ... + 3142814.

It is an arithmetic number, because the mean of its divisors is an integer number (21999565).

Almost surely, 2^125711780 is an apocalyptic number.

125711780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125711780 is an abundant number, since it is smaller than the sum of its proper divisors (138283000).

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

125711780 is a wasteful number, since it uses less digits than its factorization.

125711780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6285598 (or 6285596 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 32.

The square root of 125711780 is about 11212.1264709242. The cubic root of 125711780 is about 500.9472443231.

The spelling of 125711780 in words is "one hundred twenty-five million, seven hundred eleven thousand, seven hundred eighty".