125512515 has 12 divisors (see below), whose sum is σ = 217555104. Its totient is φ = 66939984.

The previous prime is 125512511. The next prime is 125512553. The reversal of 125512515 is 515215521.

It is not a de Polignac number, because 125512515 - 2² = 125512511 is a prime.

It is a super-3 number, since 3×125512515³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (125512511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1394539 + ... + 1394628.

It is an arithmetic number, because the mean of its divisors is an integer number (18129592).

Almost surely, 2^125512515 is an apocalyptic number.

125512515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

125512515 is a deficient number, since it is larger than the sum of its proper divisors (92042589).

125512515 is a wasteful number, since it uses less digits than its factorization.

125512515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2789178 (or 2789175 counting only the distinct ones).

The product of its digits is 2500, while the sum is 27.

The square root of 125512515 is about 11203.2368090655. The cubic root of 125512515 is about 500.6824215114.

The spelling of 125512515 in words is "one hundred twenty-five million, five hundred twelve thousand, five hundred fifteen".