142740431 has 2 divisors, whose sum is σ = 142740432. Its totient is φ = 142740430.

The previous prime is 142740421. The next prime is 142740463. The reversal of 142740431 is 134047241.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142740431 is a prime.

It is a super-2 number, since 2×142740431² = 40749661284131522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 142740431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142740421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71370215 + 71370216.

It is an arithmetic number, because the mean of its divisors is an integer number (71370216).

Almost surely, 2^142740431 is an apocalyptic number.

142740431 is a deficient number, since it is larger than the sum of its proper divisors (1).

142740431 is an equidigital number, since it uses as much as digits as its factorization.

142740431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 142740431 is about 11947.4026884507. The cubic root of 142740431 is about 522.6155583331.

Adding to 142740431 its reverse (134047241), we get a palindrome (276787672).

The spelling of 142740431 in words is "one hundred forty-two million, seven hundred forty thousand, four hundred thirty-one".