525515 has 8 divisors (see below), whose sum is σ = 641328. Its totient is φ = 413280.

The previous prime is 525493. The next prime is 525517. The reversal of 525515 is 515525.

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

It is a de Polignac number, because none of the positive numbers 2^k-525515 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (525517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 557 + ... + 1166.

It is an arithmetic number, because the mean of its divisors is an integer number (80166).

2⁵²⁵⁵¹⁵ is an apocalyptic number.

525515 is a deficient number, since it is larger than the sum of its proper divisors (115813).

525515 is a wasteful number, since it uses less digits than its factorization.

525515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1789.

The product of its digits is 1250, while the sum is 23.

The square root of 525515 is about 724.9241339616. The cubic root of 525515 is about 80.6978019585.

The spelling of 525515 in words is "five hundred twenty-five thousand, five hundred fifteen".