125409280 has 96 divisors (see below), whose sum is σ = 309975120. Its totient is φ = 48660480.

The previous prime is 125409269. The next prime is 125409293. The reversal of 125409280 is 82904521.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 378715 + ... + 379045.

Almost surely, 2^125409280 is an apocalyptic number.

125409280 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 125409280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154987560).

125409280 is an abundant number, since it is smaller than the sum of its proper divisors (184565840).

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

125409280 is an equidigital number, since it uses as much as digits as its factorization.

125409280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395 (or 375 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 125409280 is about 11198.6284874533. The cubic root of 125409280 is about 500.5451121562.

The spelling of 125409280 in words is "one hundred twenty-five million, four hundred nine thousand, two hundred eighty".