525420403 has 2 divisors, whose sum is σ = 525420404. Its totient is φ = 525420402.

The previous prime is 525420353. The next prime is 525420409. The reversal of 525420403 is 304024525.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 525420403 - 2⁹ = 525419891 is a prime.

It is not a weakly prime, because it can be changed into another prime (525420409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262710201 + 262710202.

It is an arithmetic number, because the mean of its divisors is an integer number (262710202).

Almost surely, 2^525420403 is an apocalyptic number.

525420403 is a deficient number, since it is larger than the sum of its proper divisors (1).

525420403 is an equidigital number, since it uses as much as digits as its factorization.

525420403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 525420403 is about 22922.0505845354. The cubic root of 525420403 is about 806.9295957972.

Adding to 525420403 its reverse (304024525), we get a palindrome (829444928).

The spelling of 525420403 in words is "five hundred twenty-five million, four hundred twenty thousand, four hundred three".