125445220 has 96 divisors (see below), whose sum is σ = 299335680. Its totient is φ = 43908480.

The previous prime is 125445167. The next prime is 125445301. The reversal of 125445220 is 22544521.

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 31 ways as a sum of consecutive naturals, for example, 270709 + ... + 271171.

It is an arithmetic number, because the mean of its divisors is an integer number (3118080).

Almost surely, 2^125445220 is an apocalyptic number.

125445220 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 125445220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149667840).

125445220 is an abundant number, since it is smaller than the sum of its proper divisors (173890460).

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

125445220 is a wasteful number, since it uses less digits than its factorization.

125445220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545 (or 543 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 125445220 is about 11200.2330332900. The cubic root of 125445220 is about 500.5929232727.

Adding to 125445220 its reverse (22544521), we get a palindrome (147989741).

The spelling of 125445220 in words is "one hundred twenty-five million, four hundred forty-five thousand, two hundred twenty".