525621457 has 2 divisors, whose sum is σ = 525621458. Its totient is φ = 525621456.

The previous prime is 525621367. The next prime is 525621479. The reversal of 525621457 is 754126525.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 513294336 + 12327121 = 22656^2 + 3511^2 .

It is a cyclic number.

It is not a de Polignac number, because 525621457 - 2¹⁵ = 525588689 is a prime.

It is not a weakly prime, because it can be changed into another prime (525721457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262810728 + 262810729.

It is an arithmetic number, because the mean of its divisors is an integer number (262810729).

Almost surely, 2^525621457 is an apocalyptic number.

It is an amenable number.

525621457 is a deficient number, since it is larger than the sum of its proper divisors (1).

525621457 is an equidigital number, since it uses as much as digits as its factorization.

525621457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84000, while the sum is 37.

The square root of 525621457 is about 22926.4357674716. The cubic root of 525621457 is about 807.0325075056.

The spelling of 525621457 in words is "five hundred twenty-five million, six hundred twenty-one thousand, four hundred fifty-seven".