428145248421 has 64 divisors (see below), whose sum is σ = 741482864640. Its totient is φ = 241275697920.

The previous prime is 428145248393. The next prime is 428145248429. The reversal of 428145248421 is 124842541824.

428145248421 is a `hidden beast` number, since 4 + 2 + 8 + 145 + 2 + 484 + 21 = 666.

It is not a de Polignac number, because 428145248421 - 2⁶ = 428145248357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428145248429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 91765 + ... + 929898.

It is an arithmetic number, because the mean of its divisors is an integer number (11585669760).

Almost surely, 2^428145248421 is an apocalyptic number.

It is an amenable number.

428145248421 is a deficient number, since it is larger than the sum of its proper divisors (313337616219).

428145248421 is a wasteful number, since it uses less digits than its factorization.

428145248421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021783 (or 1021777 counting only the distinct ones).

The product of its digits is 655360, while the sum is 45.

The spelling of 428145248421 in words is "four hundred twenty-eight billion, one hundred forty-five million, two hundred forty-eight thousand, four hundred twenty-one".