525686545 has 4 divisors (see below), whose sum is σ = 630823860. Its totient is φ = 420549232.

The previous prime is 525686537. The next prime is 525686591. The reversal of 525686545 is 545686525.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 385690321 + 139996224 = 19639^2 + 11832^2 .

It is a cyclic number.

It is not a de Polignac number, because 525686545 - 2³ = 525686537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 525686495 and 525686504.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52568650 + ... + 52568659.

It is an arithmetic number, because the mean of its divisors is an integer number (157705965).

Almost surely, 2^525686545 is an apocalyptic number.

It is an amenable number.

525686545 is a deficient number, since it is larger than the sum of its proper divisors (105137315).

525686545 is a wasteful number, since it uses less digits than its factorization.

525686545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105137314.

The product of its digits is 1440000, while the sum is 46.

The square root of 525686545 is about 22927.8552202337. The cubic root of 525686545 is about 807.0658178935.

The spelling of 525686545 in words is "five hundred twenty-five million, six hundred eighty-six thousand, five hundred forty-five".