125122215 has 8 divisors (see below), whose sum is σ = 200195568. Its totient is φ = 66731840.

The previous prime is 125122213. The next prime is 125122243. The reversal of 125122215 is 512221521.

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

It is not a de Polignac number, because 125122215 - 2¹ = 125122213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 125122191 and 125122200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125122213) 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 7 ways as a sum of consecutive naturals, for example, 4170726 + ... + 4170755.

It is an arithmetic number, because the mean of its divisors is an integer number (25024446).

Almost surely, 2^125122215 is an apocalyptic number.

125122215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

125122215 is a deficient number, since it is larger than the sum of its proper divisors (75073353).

125122215 is an equidigital number, since it uses as much as digits as its factorization.

125122215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8341489.

The product of its digits is 400, while the sum is 21.

The square root of 125122215 is about 11185.8041731473. The cubic root of 125122215 is about 500.1629002546.

Adding to 125122215 its reverse (512221521), we get a palindrome (637343736).

The spelling of 125122215 in words is "one hundred twenty-five million, one hundred twenty-two thousand, two hundred fifteen".