125615505 has 8 divisors (see below), whose sum is σ = 200984832. Its totient is φ = 66994928.

The previous prime is 125615471. The next prime is 125615509. The reversal of 125615505 is 505516521.

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

It is a cyclic number.

It is not a de Polignac number, because 125615505 - 2⁸ = 125615249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125615509) 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, 4187169 + ... + 4187198.

It is an arithmetic number, because the mean of its divisors is an integer number (25123104).

Almost surely, 2^125615505 is an apocalyptic number.

125615505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125615505 is a deficient number, since it is larger than the sum of its proper divisors (75369327).

125615505 is an equidigital number, since it uses as much as digits as its factorization.

125615505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8374375.

The product of its (nonzero) digits is 7500, while the sum is 30.

The square root of 125615505 is about 11207.8323060260. The cubic root of 125615505 is about 500.8193299967.

It can be divided in two parts, 1256 and 15505, that added together give a palindrome (16761).

The spelling of 125615505 in words is "one hundred twenty-five million, six hundred fifteen thousand, five hundred five".