142321547 has 2 divisors, whose sum is σ = 142321548. Its totient is φ = 142321546.

The previous prime is 142321513. The next prime is 142321561. The reversal of 142321547 is 745123241.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 142321547 - 2¹² = 142317451 is a prime.

It is not a weakly prime, because it can be changed into another prime (142321147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71160773 + 71160774.

It is an arithmetic number, because the mean of its divisors is an integer number (71160774).

Almost surely, 2^142321547 is an apocalyptic number.

142321547 is a deficient number, since it is larger than the sum of its proper divisors (1).

142321547 is an equidigital number, since it uses as much as digits as its factorization.

142321547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 29.

The square root of 142321547 is about 11929.8594710919. The cubic root of 142321547 is about 522.1038374289.

Adding to 142321547 its reverse (745123241), we get a palindrome (887444788).

The spelling of 142321547 in words is "one hundred forty-two million, three hundred twenty-one thousand, five hundred forty-seven".