525405289 has 4 divisors (see below), whose sum is σ = 526349124. Its totient is φ = 524461456.

The previous prime is 525405269. The next prime is 525405299. The reversal of 525405289 is 982504525.

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 75116889 + 450288400 = 8667^2 + 21220^2 .

It is a cyclic number.

It is not a de Polignac number, because 525405289 - 2⁷ = 525405161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (525405229) 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, 471082 + ... + 472195.

It is an arithmetic number, because the mean of its divisors is an integer number (131587281).

Almost surely, 2^525405289 is an apocalyptic number.

It is an amenable number.

525405289 is a deficient number, since it is larger than the sum of its proper divisors (943835).

525405289 is an equidigital number, since it uses as much as digits as its factorization.

525405289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943834.

The product of its (nonzero) digits is 144000, while the sum is 40.

The square root of 525405289 is about 22921.7208996183. The cubic root of 525405289 is about 806.9218584687.

The spelling of 525405289 in words is "five hundred twenty-five million, four hundred five thousand, two hundred eighty-nine".