125565220 has 48 divisors (see below), whose sum is σ = 290558016. Its totient is φ = 45200000.

The previous prime is 125565217. The next prime is 125565227. The reversal of 125565220 is 22565521.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (125565227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19395 + ... + 25045.

It is an arithmetic number, because the mean of its divisors is an integer number (6053292).

Almost surely, 2^125565220 is an apocalyptic number.

125565220 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 125565220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145279008).

125565220 is an abundant number, since it is smaller than the sum of its proper divisors (164992796).

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

125565220 is a wasteful number, since it uses less digits than its factorization.

125565220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5772 (or 5770 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 125565220 is about 11205.5887841737. The cubic root of 125565220 is about 500.7524936053.

The spelling of 125565220 in words is "one hundred twenty-five million, five hundred sixty-five thousand, two hundred twenty".