1428750871 has 4 divisors (see below), whose sum is σ = 1428859672. Its totient is φ = 1428642072.

The previous prime is 1428750863. The next prime is 1428750887. The reversal of 1428750871 is 1780578241.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1780578241 = 13 ⋅136967557.

It is a cyclic number.

It is not a de Polignac number, because 1428750871 - 2³ = 1428750863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428750371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31485 + ... + 62038.

It is an arithmetic number, because the mean of its divisors is an integer number (357214918).

Almost surely, 2^1428750871 is an apocalyptic number.

1428750871 is a deficient number, since it is larger than the sum of its proper divisors (108801).

1428750871 is an equidigital number, since it uses as much as digits as its factorization.

1428750871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108800.

The product of its (nonzero) digits is 125440, while the sum is 43.

The square root of 1428750871 is about 37798.8210265876. The cubic root of 1428750871 is about 1126.2950343555.

The spelling of 1428750871 in words is "one billion, four hundred twenty-eight million, seven hundred fifty thousand, eight hundred seventy-one".