69142543 has 4 divisors (see below), whose sum is σ = 69524728. Its totient is φ = 68760360.

The previous prime is 69142477. The next prime is 69142547. The reversal of 69142543 is 34524196.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-69142543 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 69142499 and 69142508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69142547) 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 3 ways as a sum of consecutive naturals, for example, 190821 + ... + 191182.

It is an arithmetic number, because the mean of its divisors is an integer number (17381182).

Almost surely, 2^69142543 is an apocalyptic number.

69142543 is a deficient number, since it is larger than the sum of its proper divisors (382185).

69142543 is a wasteful number, since it uses less digits than its factorization.

69142543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382184.

The product of its digits is 25920, while the sum is 34.

The square root of 69142543 is about 8315.1995165480. The cubic root of 69142543 is about 410.4388380795.

It can be divided in two parts, 691 and 42543, that added together give a palindrome (43234).

The spelling of 69142543 in words is "sixty-nine million, one hundred forty-two thousand, five hundred forty-three".