125531250 has 112 divisors (see below), whose sum is σ = 341245632. Its totient is φ = 30600000.

The previous prime is 125531221. The next prime is 125531251. The reversal of 125531250 is 52135521.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 125531250.

It is not an unprimeable number, because it can be changed into a prime (125531251) 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 55 ways as a sum of consecutive naturals, for example, 1218699 + ... + 1218801.

It is an arithmetic number, because the mean of its divisors is an integer number (3046836).

Almost surely, 2^125531250 is an apocalyptic number.

125531250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 125531250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170622816).

125531250 is an abundant number, since it is smaller than the sum of its proper divisors (215714382).

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

125531250 is an equidigital number, since it uses as much as digits as its factorization.

125531250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151 (or 126 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 125531250 is about 11204.0729201483. The cubic root of 125531250 is about 500.7073322237.

Adding to 125531250 its reverse (52135521), we get a palindrome (177666771).

The spelling of 125531250 in words is "one hundred twenty-five million, five hundred thirty-one thousand, two hundred fifty".