999525 has 12 divisors (see below), whose sum is σ = 1652672. Its totient is φ = 533040.

The previous prime is 999521. The next prime is 999529. The reversal of 999525 is 525999.

It is an interprime number because it is at equal distance from previous prime (999521) and next prime (999529).

It is not a de Polignac number, because 999525 - 2² = 999521 is a prime.

It is a Duffinian number.

999525 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999521) 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, 6589 + ... + 6738.

2⁹⁹⁹⁵²⁵ is an apocalyptic number.

It is an amenable number.

999525 is a deficient number, since it is larger than the sum of its proper divisors (653147).

999525 is a wasteful number, since it uses less digits than its factorization.

999525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13340 (or 13335 counting only the distinct ones).

The product of its digits is 36450, while the sum is 39.

The square root of 999525 is about 999.7624717902. The cubic root of 999525 is about 99.9841641591.

The spelling of 999525 in words is "nine hundred ninety-nine thousand, five hundred twenty-five".