425525521 has 8 divisors (see below), whose sum is σ = 456261120. Its totient is φ = 395423808.

The previous prime is 425525483. The next prime is 425525537. The reversal of 425525521 is 125525524.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 425525521 - 2¹⁷ = 425394449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (425525591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157081 + ... + 159766.

It is an arithmetic number, because the mean of its divisors is an integer number (57032640).

Almost surely, 2^425525521 is an apocalyptic number.

It is an amenable number.

425525521 is a deficient number, since it is larger than the sum of its proper divisors (30735599).

425525521 is a wasteful number, since it uses less digits than its factorization.

425525521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316943.

The product of its digits is 20000, while the sum is 31.

The square root of 425525521 is about 20628.2699468472. The cubic root of 425525521 is about 752.1570618682.

The spelling of 425525521 in words is "four hundred twenty-five million, five hundred twenty-five thousand, five hundred twenty-one".