525285405 has 20 divisors (see below), whose sum is σ = 941623452. Its totient is φ = 280152000.

The previous prime is 525285367. The next prime is 525285413. The reversal of 525285405 is 504582525.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 254913156 + 270372249 = 15966^2 + 16443^2 .

It is not a de Polignac number, because 525285405 - 2¹⁰ = 525284381 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 525285405.

It is a congruent number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 648096 + ... + 648905.

Almost surely, 2^525285405 is an apocalyptic number.

It is an amenable number.

525285405 is a deficient number, since it is larger than the sum of its proper divisors (416338047).

525285405 is a wasteful number, since it uses less digits than its factorization.

525285405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297018 (or 1297009 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 36.

The square root of 525285405 is about 22919.1056762693. The cubic root of 525285405 is about 806.8604808486.

The spelling of 525285405 in words is "five hundred twenty-five million, two hundred eighty-five thousand, four hundred five".