421204525 has 24 divisors (see below), whose sum is σ = 605102144. Its totient is φ = 284860800.

The previous prime is 421204513. The next prime is 421204541. The reversal of 421204525 is 525402124.

It is not a de Polignac number, because 421204525 - 2⁵ = 421204493 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 421204525.

It is a congruent number.

It is an unprimeable number.

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, 3711 + ... + 29260.

Almost surely, 2^421204525 is an apocalyptic number.

It is an amenable number.

421204525 is a deficient number, since it is larger than the sum of its proper divisors (183897619).

421204525 is a wasteful number, since it uses less digits than its factorization.

421204525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33061 (or 33056 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 421204525 is about 20523.2678928089. The cubic root of 421204525 is about 749.6024708128.

Adding to 421204525 its reverse (525402124), we get a palindrome (946606649).

The spelling of 421204525 in words is "four hundred twenty-one million, two hundred four thousand, five hundred twenty-five".