125231220 has 144 divisors (see below), whose sum is σ = 396264960. Its totient is φ = 31987200.

The previous prime is 125231219. The next prime is 125231263. The reversal of 125231220 is 22132521.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 125231193 and 125231202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 523861 + ... + 524099.

It is an arithmetic number, because the mean of its divisors is an integer number (2751840).

Almost surely, 2^125231220 is an apocalyptic number.

125231220 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 125231220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198132480).

125231220 is an abundant number, since it is smaller than the sum of its proper divisors (271033740).

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

125231220 is a wasteful number, since it uses less digits than its factorization.

125231220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366 (or 361 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 125231220 is about 11190.6755828234. The cubic root of 125231220 is about 500.3081034389.

Adding to 125231220 its reverse (22132521), we get a palindrome (147363741).

The spelling of 125231220 in words is "one hundred twenty-five million, two hundred thirty-one thousand, two hundred twenty".