125311216 has 40 divisors (see below), whose sum is σ = 260635104. Its totient is φ = 58152960.

The previous prime is 125311201. The next prime is 125311223. The reversal of 125311216 is 612113521.

It is a happy number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 16701 + ... + 23011.

Almost surely, 2^125311216 is an apocalyptic number.

125311216 is a gapful number since it is divisible by the number (16) 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 125311216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130317552).

125311216 is an abundant number, since it is smaller than the sum of its proper divisors (135323888).

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

125311216 is a wasteful number, since it uses less digits than its factorization.

125311216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6409 (or 6403 counting only the distinct ones).

The product of its digits is 360, while the sum is 22.

The square root of 125311216 is about 11194.2492378900. The cubic root of 125311216 is about 500.4146107675.

Adding to 125311216 its reverse (612113521), we get a palindrome (737424737).

The spelling of 125311216 in words is "one hundred twenty-five million, three hundred eleven thousand, two hundred sixteen".