142531243 has 4 divisors (see below), whose sum is σ = 142792360. Its totient is φ = 142270128.

The previous prime is 142531241. The next prime is 142531271. The reversal of 142531243 is 342135241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342135241 = 7 ⋅48876463.

It is a cyclic number.

It is not a de Polignac number, because 142531243 - 2¹ = 142531241 is a prime.

It is a super-2 number, since 2×142531243² = 40630310462250098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142531241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129738 + ... + 130831.

It is an arithmetic number, because the mean of its divisors is an integer number (35698090).

Almost surely, 2^142531243 is an apocalyptic number.

142531243 is a deficient number, since it is larger than the sum of its proper divisors (261117).

142531243 is an equidigital number, since it uses as much as digits as its factorization.

142531243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261116.

The product of its digits is 2880, while the sum is 25.

The square root of 142531243 is about 11938.6449398581. The cubic root of 142531243 is about 522.3601334991.

Adding to 142531243 its reverse (342135241), we get a palindrome (484666484).

The spelling of 142531243 in words is "one hundred forty-two million, five hundred thirty-one thousand, two hundred forty-three".