142312447 has 2 divisors, whose sum is σ = 142312448. Its totient is φ = 142312446.

The previous prime is 142312441. The next prime is 142312463. The reversal of 142312447 is 744213241.

It is a weak prime.

It is an emirp because it is prime and its reverse (744213241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142312447 - 2²⁷ = 8094719 is a prime.

It is a super-2 number, since 2×142312447² = 40505665142255618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142312441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71156223 + 71156224.

It is an arithmetic number, because the mean of its divisors is an integer number (71156224).

Almost surely, 2^142312447 is an apocalyptic number.

142312447 is a deficient number, since it is larger than the sum of its proper divisors (1).

142312447 is an equidigital number, since it uses as much as digits as its factorization.

142312447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 28.

The square root of 142312447 is about 11929.4780690523. The cubic root of 142312447 is about 522.0927094672.

Adding to 142312447 its reverse (744213241), we get a palindrome (886525688).

The spelling of 142312447 in words is "one hundred forty-two million, three hundred twelve thousand, four hundred forty-seven".