421784487125 has 16 divisors (see below), whose sum is σ = 527977384896. Its totient is φ = 336408138000.

The previous prime is 421784487097. The next prime is 421784487181. The reversal of 421784487125 is 521784487124.

It is not a de Polignac number, because 421784487125 - 2¹⁴ = 421784470741 is a prime.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5055719 + ... + 5138468.

It is an arithmetic number, because the mean of its divisors is an integer number (32998586556).

Almost surely, 2^421784487125 is an apocalyptic number.

It is an amenable number.

421784487125 is a deficient number, since it is larger than the sum of its proper divisors (106192897771).

421784487125 is a wasteful number, since it uses less digits than its factorization.

421784487125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10194533 (or 10194523 counting only the distinct ones).

The product of its digits is 4014080, while the sum is 53.

Subtracting 421784487125 from its reverse (521784487124), we obtain a palindrome (99999999999).

The spelling of 421784487125 in words is "four hundred twenty-one billion, seven hundred eighty-four million, four hundred eighty-seven thousand, one hundred twenty-five".