125451280 has 20 divisors (see below), whose sum is σ = 291674412. Its totient is φ = 50180480.

The previous prime is 125451241. The next prime is 125451299. The reversal of 125451280 is 82154521.

It can be written as a sum of positive squares in 2 ways, for example, as 89643024 + 35808256 = 9468^2 + 5984^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 783991 + ... + 784150.

Almost surely, 2^125451280 is an apocalyptic number.

125451280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125451280 is an abundant number, since it is smaller than the sum of its proper divisors (166223132).

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

125451280 is a wasteful number, since it uses less digits than its factorization.

125451280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1568154 (or 1568148 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 28.

The square root of 125451280 is about 11200.5035601084. The cubic root of 125451280 is about 500.6009840137.

The spelling of 125451280 in words is "one hundred twenty-five million, four hundred fifty-one thousand, two hundred eighty".