425281521 has 16 divisors (see below), whose sum is σ = 661837824. Its totient is φ = 237846864.

The previous prime is 425281517. The next prime is 425281553. The reversal of 425281521 is 125182524.

It is not a de Polignac number, because 425281521 - 2² = 425281517 is a prime.

It is not an unprimeable number, because it can be changed into a prime (425281501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214455 + ... + 216428.

It is an arithmetic number, because the mean of its divisors is an integer number (41364864).

Almost surely, 2^425281521 is an apocalyptic number.

It is an amenable number.

425281521 is a deficient number, since it is larger than the sum of its proper divisors (236556303).

425281521 is a wasteful number, since it uses less digits than its factorization.

425281521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430940.

The product of its digits is 6400, while the sum is 30.

The square root of 425281521 is about 20622.3548849301. The cubic root of 425281521 is about 752.0132699343.

The spelling of 425281521 in words is "four hundred twenty-five million, two hundred eighty-one thousand, five hundred twenty-one".