142478291 has 6 divisors (see below), whose sum is σ = 145576500. Its totient is φ = 139444676.

The previous prime is 142478267. The next prime is 142478299. The reversal of 142478291 is 192874241.

It is a happy number.

It is not a de Polignac number, because 142478291 - 2¹⁸ = 142216147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142478299) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30041 + ... + 34458.

It is an arithmetic number, because the mean of its divisors is an integer number (24262750).

Almost surely, 2^142478291 is an apocalyptic number.

142478291 is a deficient number, since it is larger than the sum of its proper divisors (3098209).

142478291 is an frugal number, since it uses more digits than its factorization.

142478291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64593 (or 64546 counting only the distinct ones).

The product of its digits is 32256, while the sum is 38.

The square root of 142478291 is about 11936.4270617300. The cubic root of 142478291 is about 522.2954378828.

The spelling of 142478291 in words is "one hundred forty-two million, four hundred seventy-eight thousand, two hundred ninety-one".