525021361 has 4 divisors (see below), whose sum is σ = 525067812. Its totient is φ = 524974912.

The previous prime is 525021347. The next prime is 525021461. The reversal of 525021361 is 163120525.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 304677025 + 220344336 = 17455^2 + 14844^2 .

It is a cyclic number.

It is not a de Polignac number, because 525021361 - 2⁹ = 525020849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (525021311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5925 + ... + 32941.

It is an arithmetic number, because the mean of its divisors is an integer number (131266953).

Almost surely, 2^525021361 is an apocalyptic number.

It is an amenable number.

525021361 is a deficient number, since it is larger than the sum of its proper divisors (46451).

525021361 is a wasteful number, since it uses less digits than its factorization.

525021361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46450.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 525021361 is about 22913.3446052731. The cubic root of 525021361 is about 806.7252639589.

Adding to 525021361 its reverse (163120525), we get a palindrome (688141886).

The spelling of 525021361 in words is "five hundred twenty-five million, twenty-one thousand, three hundred sixty-one".