525418 has 4 divisors (see below), whose sum is σ = 788130. Its totient is φ = 262708.

The previous prime is 525409. The next prime is 525431. The reversal of 525418 is 814525.

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

It can be written as a sum of positive squares in only one way, i.e., 439569 + 85849 = 663^2 + 293^2 .

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 525392 and 525401.

It is an unprimeable number.

525418 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131353 + ... + 131356.

2⁵²⁵⁴¹⁸ is an apocalyptic number.

525418 is a deficient number, since it is larger than the sum of its proper divisors (262712).

525418 is a wasteful number, since it uses less digits than its factorization.

525418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262711.

The product of its digits is 1600, while the sum is 25.

The square root of 525418 is about 724.8572273214. The cubic root of 525418 is about 80.6928365636.

The spelling of 525418 in words is "five hundred twenty-five thousand, four hundred eighteen".