125221980 has 48 divisors (see below), whose sum is σ = 377594784. Its totient is φ = 30823680.

The previous prime is 125221969. The next prime is 125221981. The reversal of 125221980 is 89122521.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125221981) 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, 79491 + ... + 81050.

It is an arithmetic number, because the mean of its divisors is an integer number (7866558).

Almost surely, 2^125221980 is an apocalyptic number.

125221980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125221980 is an abundant number, since it is smaller than the sum of its proper divisors (252372804).

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

125221980 is a wasteful number, since it uses less digits than its factorization.

125221980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160566 (or 160564 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 125221980 is about 11190.2627315001. The cubic root of 125221980 is about 500.2957983055.

It can be divided in two parts, 1252 and 21980, that added together give a palindrome (23232).

The spelling of 125221980 in words is "one hundred twenty-five million, two hundred twenty-one thousand, nine hundred eighty".