1442857143 has 64 divisors (see below), whose sum is σ = 2462487552. Its totient is φ = 731151360.

The previous prime is 1442857139. The next prime is 1442857147. The reversal of 1442857143 is 3417582441.

It is an interprime number because it is at equal distance from previous prime (1442857139) and next prime (1442857147).

It is not a de Polignac number, because 1442857143 - 2² = 1442857139 is a prime.

It is a super-2 number, since 2×1442857143² = 4163673470212244898, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1442857147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 837523 + ... + 839243.

It is an arithmetic number, because the mean of its divisors is an integer number (38476368).

Almost surely, 2^1442857143 is an apocalyptic number.

1442857143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1442857143 is a deficient number, since it is larger than the sum of its proper divisors (1019630409).

1442857143 is a wasteful number, since it uses less digits than its factorization.

1442857143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1864.

The product of its digits is 107520, while the sum is 39.

The square root of 1442857143 is about 37984.9594313328. The cubic root of 1442857143 is about 1129.9895952784.

The spelling of 1442857143 in words is "one billion, four hundred forty-two million, eight hundred fifty-seven thousand, one hundred forty-three".