525974521 has 2 divisors, whose sum is σ = 525974522. Its totient is φ = 525974520.

The previous prime is 525974503. The next prime is 525974593. The reversal of 525974521 is 125479525.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 500864400 + 25110121 = 22380^2 + 5011^2 .

It is a cyclic number.

It is not a de Polignac number, because 525974521 - 2²⁷ = 391756793 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (525974821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262987260 + 262987261.

It is an arithmetic number, because the mean of its divisors is an integer number (262987261).

Almost surely, 2^525974521 is an apocalyptic number.

It is an amenable number.

525974521 is a deficient number, since it is larger than the sum of its proper divisors (1).

525974521 is an equidigital number, since it uses as much as digits as its factorization.

525974521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 126000, while the sum is 40.

The square root of 525974521 is about 22934.1344070362. The cubic root of 525974521 is about 807.2131637223.

The spelling of 525974521 in words is "five hundred twenty-five million, nine hundred seventy-four thousand, five hundred twenty-one".