525428 has 6 divisors (see below), whose sum is σ = 919506. Its totient is φ = 262712.

The previous prime is 525409. The next prime is 525431. The reversal of 525428 is 824525.

It can be written as a sum of positive squares in only one way, i.e., 394384 + 131044 = 628^2 + 362^2 .

It is a d-powerful number, because it can be written as 5² + 2 + 4⁵ + 5² + 2¹⁹ + 8² .

It is a junction number, because it is equal to n+sod(n) for n = 525397 and 525406.

It is a congruent number.

It is an unprimeable number.

525428 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, 65675 + ... + 65682.

It is an arithmetic number, because the mean of its divisors is an integer number (153251).

2⁵²⁵⁴²⁸ is an apocalyptic number.

It is an amenable number.

525428 is a deficient number, since it is larger than the sum of its proper divisors (394078).

525428 is a wasteful number, since it uses less digits than its factorization.

525428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131361 (or 131359 counting only the distinct ones).

The product of its digits is 3200, while the sum is 26.

The square root of 525428 is about 724.8641251986. The cubic root of 525428 is about 80.6933484883.

The spelling of 525428 in words is "five hundred twenty-five thousand, four hundred twenty-eight".