125211424 has 60 divisors (see below), whose sum is σ = 269001054. Its totient is φ = 57368064.

The previous prime is 125211413. The next prime is 125211439. The reversal of 125211424 is 424112521.

It can be written as a sum of positive squares in 5 ways, for example, as 14288400 + 110923024 = 3780^2 + 10532^2 .

It is a junction number, because it is equal to n+sod(n) for n = 125211395 and 125211404.

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 9 ways as a sum of consecutive naturals, for example, 913884 + ... + 914020.

Almost surely, 2^125211424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 125211424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134500527).

125211424 is an abundant number, since it is smaller than the sum of its proper divisors (143789630).

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

125211424 is an frugal number, since it uses more digits than its factorization.

125211424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199 (or 152 counting only the distinct ones).

The product of its digits is 640, while the sum is 22.

The square root of 125211424 is about 11189.7910614989. The cubic root of 125211424 is about 500.2817398821.

Adding to 125211424 its reverse (424112521), we get a palindrome (549323945).

The spelling of 125211424 in words is "one hundred twenty-five million, two hundred eleven thousand, four hundred twenty-four".