1142857384 has 8 divisors (see below), whose sum is σ = 2142857610. Its totient is φ = 571428688.

The previous prime is 1142857367. The next prime is 1142857421. The reversal of 1142857384 is 4837582411.

It can be written as a sum of positive squares in only one way, i.e., 832322500 + 310534884 = 28850^2 + 17622^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1142857384² = 2612246000326646912, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1142857384.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71428579 + ... + 71428594.

Almost surely, 2^1142857384 is an apocalyptic number.

It is an amenable number.

1142857384 is a deficient number, since it is larger than the sum of its proper divisors (1000000226).

1142857384 is a wasteful number, since it uses less digits than its factorization.

1142857384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142857179 (or 142857175 counting only the distinct ones).

The product of its digits is 215040, while the sum is 43.

The square root of 1142857384 is about 33806.1737556914. The cubic root of 1142857384 is about 1045.5159906840.

The spelling of 1142857384 in words is "one billion, one hundred forty-two million, eight hundred fifty-seven thousand, three hundred eighty-four".