1142857885 has 16 divisors (see below), whose sum is σ = 1554658560. Its totient is φ = 799536960.

The previous prime is 1142857883. The next prime is 1142857901. The reversal of 1142857885 is 5887582411.

It is a happy number.

It is not a de Polignac number, because 1142857885 - 2¹ = 1142857883 is a prime.

It is a super-2 number, since 2×1142857885² = 2612248290613346450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142857883) 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, 461461 + ... + 463930.

It is an arithmetic number, because the mean of its divisors is an integer number (97166160).

Almost surely, 2^1142857885 is an apocalyptic number.

It is an amenable number.

1142857885 is a deficient number, since it is larger than the sum of its proper divisors (411800675).

1142857885 is a wasteful number, since it uses less digits than its factorization.

1142857885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925428.

The product of its digits is 716800, while the sum is 49.

The square root of 1142857885 is about 33806.1811655798. The cubic root of 1142857885 is about 1045.5161434600.

The spelling of 1142857885 in words is "one billion, one hundred forty-two million, eight hundred fifty-seven thousand, eight hundred eighty-five".