125681280 has 128 divisors (see below), whose sum is σ = 407004480. Its totient is φ = 32980992.

The previous prime is 125681263. The next prime is 125681291. The reversal of 125681280 is 82186521.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128152 + ... + 129128.

Almost surely, 2^125681280 is an apocalyptic number.

125681280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 125681280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (203502240).

125681280 is an abundant number, since it is smaller than the sum of its proper divisors (281323200).

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

125681280 is an equidigital number, since it uses as much as digits as its factorization.

125681280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066 (or 1054 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 125681280 is about 11210.7662539186. The cubic root of 125681280 is about 500.9067280279.

The spelling of 125681280 in words is "one hundred twenty-five million, six hundred eighty-one thousand, two hundred eighty".