142247487 has 4 divisors (see below), whose sum is σ = 189663320. Its totient is φ = 94831656.

The previous prime is 142247477. The next prime is 142247489. The reversal of 142247487 is 784742241.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 142247487 - 2⁷ = 142247359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142247489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23707912 + ... + 23707917.

It is an arithmetic number, because the mean of its divisors is an integer number (47415830).

Almost surely, 2^142247487 is an apocalyptic number.

142247487 is a deficient number, since it is larger than the sum of its proper divisors (47415833).

142247487 is an equidigital number, since it uses as much as digits as its factorization.

142247487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47415832.

The product of its digits is 100352, while the sum is 39.

The square root of 142247487 is about 11926.7550909709. The cubic root of 142247487 is about 522.0132591573.

The spelling of 142247487 in words is "one hundred forty-two million, two hundred forty-seven thousand, four hundred eighty-seven".