142438786505 has 8 divisors (see below), whose sum is σ = 171262355400. Its totient is φ = 113727154816.

The previous prime is 142438786493. The next prime is 142438786549. The reversal of 142438786505 is 505687834241.

It can be written as a sum of positive squares in 4 ways, for example, as 82635551296 + 59803235209 = 287464^2 + 244547^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 142438786505 - 2¹⁴ = 142438770121 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27981500 + ... + 27986589.

It is an arithmetic number, because the mean of its divisors is an integer number (21407794425).

Almost surely, 2^142438786505 is an apocalyptic number.

It is an amenable number.

142438786505 is a deficient number, since it is larger than the sum of its proper divisors (28823568895).

142438786505 is an equidigital number, since it uses as much as digits as its factorization.

142438786505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55968603.

The product of its (nonzero) digits is 6451200, while the sum is 53.

The spelling of 142438786505 in words is "one hundred forty-two billion, four hundred thirty-eight million, seven hundred eighty-six thousand, five hundred five".