125522015 has 4 divisors (see below), whose sum is σ = 150626424. Its totient is φ = 100417608.

The previous prime is 125521997. The next prime is 125522027. The reversal of 125522015 is 510225521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125522015 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 12552197 + ... + 12552206.

It is an arithmetic number, because the mean of its divisors is an integer number (37656606).

Almost surely, 2^125522015 is an apocalyptic number.

125522015 is a deficient number, since it is larger than the sum of its proper divisors (25104409).

125522015 is an equidigital number, since it uses as much as digits as its factorization.

125522015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25104408.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 125522015 is about 11203.6607856539. The cubic root of 125522015 is about 500.6950533540.

Adding to 125522015 its reverse (510225521), we get a palindrome (635747536).

The spelling of 125522015 in words is "one hundred twenty-five million, five hundred twenty-two thousand, fifteen".