125559515 has 4 divisors (see below), whose sum is σ = 150671424. Its totient is φ = 100447608.

The previous prime is 125559457. The next prime is 125559529. The reversal of 125559515 is 515955521.

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

It is a cyclic number.

It is not a de Polignac number, because 125559515 - 2¹⁰ = 125558491 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 12555947 + ... + 12555956.

It is an arithmetic number, because the mean of its divisors is an integer number (37667856).

Almost surely, 2^125559515 is an apocalyptic number.

125559515 is a deficient number, since it is larger than the sum of its proper divisors (25111909).

125559515 is an equidigital number, since it uses as much as digits as its factorization.

125559515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25111908.

The product of its digits is 56250, while the sum is 38.

The square root of 125559515 is about 11205.3342208075. The cubic root of 125559515 is about 500.7449096680.

The spelling of 125559515 in words is "one hundred twenty-five million, five hundred fifty-nine thousand, five hundred fifteen".