421534525 has 24 divisors (see below), whose sum is σ = 541974240. Its totient is φ = 324970560.

The previous prime is 421534523. The next prime is 421534649. The reversal of 421534525 is 525435124.

It is not a de Polignac number, because 421534525 - 2¹ = 421534523 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421534523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 96846 + ... + 101104.

It is an arithmetic number, because the mean of its divisors is an integer number (22582260).

Almost surely, 2^421534525 is an apocalyptic number.

It is an amenable number.

421534525 is a deficient number, since it is larger than the sum of its proper divisors (120439715).

421534525 is a wasteful number, since it uses less digits than its factorization.

421534525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4413 (or 4408 counting only the distinct ones).

The product of its digits is 24000, while the sum is 31.

The square root of 421534525 is about 20531.3059740485. The cubic root of 421534525 is about 749.7981827350.

Adding to 421534525 its reverse (525435124), we get a palindrome (946969649).

The spelling of 421534525 in words is "four hundred twenty-one million, five hundred thirty-four thousand, five hundred twenty-five".