125415215 has 4 divisors (see below), whose sum is σ = 150498264. Its totient is φ = 100332168.

The previous prime is 125415193. The next prime is 125415217. The reversal of 125415215 is 512514521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 512514521 = 17 ⋅30147913.

It is a cyclic number.

It is not a de Polignac number, because 125415215 - 2⁸ = 125414959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125415217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12541517 + ... + 12541526.

It is an arithmetic number, because the mean of its divisors is an integer number (37624566).

Almost surely, 2^125415215 is an apocalyptic number.

125415215 is a deficient number, since it is larger than the sum of its proper divisors (25083049).

125415215 is an equidigital number, since it uses as much as digits as its factorization.

125415215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25083048.

The product of its digits is 2000, while the sum is 26.

The square root of 125415215 is about 11198.8934721248. The cubic root of 125415215 is about 500.5530081385.

Adding to 125415215 its reverse (512514521), we get a palindrome (637929736).

The spelling of 125415215 in words is "one hundred twenty-five million, four hundred fifteen thousand, two hundred fifteen".