1428521487 has 16 divisors (see below), whose sum is σ = 1925629440. Its totient is φ = 941932800.

The previous prime is 1428521473. The next prime is 1428521537. The reversal of 1428521487 is 7841258241.

It is not a de Polignac number, because 1428521487 - 2⁷ = 1428521359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428521387) 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 15 ways as a sum of consecutive naturals, for example, 106687 + ... + 119327.

It is an arithmetic number, because the mean of its divisors is an integer number (120351840).

Almost surely, 2^1428521487 is an apocalyptic number.

1428521487 is a deficient number, since it is larger than the sum of its proper divisors (497107953).

1428521487 is a wasteful number, since it uses less digits than its factorization.

1428521487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13054.

The product of its digits is 143360, while the sum is 42.

The square root of 1428521487 is about 37795.7866302581. The cubic root of 1428521487 is about 1126.2347560866.

The spelling of 1428521487 in words is "one billion, four hundred twenty-eight million, five hundred twenty-one thousand, four hundred eighty-seven".