142069729 has 4 divisors (see below), whose sum is σ = 143868160. Its totient is φ = 140271300.

The previous prime is 142069727. The next prime is 142069747. The reversal of 142069729 is 927960241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 142069729 - 2¹ = 142069727 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142069691 and 142069700.

It is not an unprimeable number, because it can be changed into a prime (142069723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 899097 + ... + 899254.

It is an arithmetic number, because the mean of its divisors is an integer number (35967040).

Almost surely, 2^142069729 is an apocalyptic number.

It is an amenable number.

142069729 is a deficient number, since it is larger than the sum of its proper divisors (1798431).

142069729 is an equidigital number, since it uses as much as digits as its factorization.

142069729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1798430.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 142069729 is about 11919.3006925742. The cubic root of 142069729 is about 521.7957258195.

The spelling of 142069729 in words is "one hundred forty-two million, sixty-nine thousand, seven hundred twenty-nine".