125311115 has 8 divisors (see below), whose sum is σ = 150855648. Its totient is φ = 99927360.

The previous prime is 125311111. The next prime is 125311127. The reversal of 125311115 is 511113521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 125311115 - 2² = 125311111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125311111) by changing a digit.

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, 38471 + ... + 41600.

It is an arithmetic number, because the mean of its divisors is an integer number (18856956).

Almost surely, 2^125311115 is an apocalyptic number.

125311115 is a deficient number, since it is larger than the sum of its proper divisors (25544533).

125311115 is an equidigital number, since it uses as much as digits as its factorization.

125311115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80389.

The product of its digits is 150, while the sum is 20.

The square root of 125311115 is about 11194.2447266441. The cubic root of 125311115 is about 500.4144763238.

Adding to 125311115 its reverse (511113521), we get a palindrome (636424636).

The spelling of 125311115 in words is "one hundred twenty-five million, three hundred eleven thousand, one hundred fifteen".