1542662543 has 4 divisors (see below), whose sum is σ = 1559995920. Its totient is φ = 1525329168.

The previous prime is 1542662461. The next prime is 1542662551. The reversal of 1542662543 is 3452662451.

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 1542662543 - 2²⁰ = 1541613967 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1542662497 and 1542662506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1542667543) 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, 8666555 + ... + 8666732.

It is an arithmetic number, because the mean of its divisors is an integer number (389998980).

Almost surely, 2^1542662543 is an apocalyptic number.

1542662543 is a deficient number, since it is larger than the sum of its proper divisors (17333377).

1542662543 is an equidigital number, since it uses as much as digits as its factorization.

1542662543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17333376.

The product of its digits is 172800, while the sum is 38.

The square root of 1542662543 is about 39276.7430294316. The cubic root of 1542662543 is about 1155.4654878049.

The spelling of 1542662543 in words is "one billion, five hundred forty-two million, six hundred sixty-two thousand, five hundred forty-three".