1542857143 has 4 divisors (see below), whose sum is σ = 1543103848. Its totient is φ = 1542610440.

The previous prime is 1542857111. The next prime is 1542857167. The reversal of 1542857143 is 3417582451.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1542857143 - 2⁵ = 1542857111 is a prime.

It is a super-2 number, since 2×1542857143² = 4760816327412244898, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1542857096 and 1542857105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1542857443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113721 + ... + 126562.

It is an arithmetic number, because the mean of its divisors is an integer number (385775962).

Almost surely, 2^1542857143 is an apocalyptic number.

1542857143 is a deficient number, since it is larger than the sum of its proper divisors (246705).

1542857143 is an equidigital number, since it uses as much as digits as its factorization.

1542857143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246704.

The product of its digits is 134400, while the sum is 40.

The square root of 1542857143 is about 39279.2202442971. The cubic root of 1542857143 is about 1155.5140713682.

The spelling of 1542857143 in words is "one billion, five hundred forty-two million, eight hundred fifty-seven thousand, one hundred forty-three".