142355009 has 4 divisors (see below), whose sum is σ = 142869204. Its totient is φ = 141840816.

The previous prime is 142354999. The next prime is 142355033. The reversal of 142355009 is 900553241.

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

It can be written as a sum of positive squares in 2 ways, for example, as 80496784 + 61858225 = 8972^2 + 7865^2 .

It is a cyclic number.

It is not a de Polignac number, because 142355009 - 2¹² = 142350913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142355039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256682 + ... + 257235.

It is an arithmetic number, because the mean of its divisors is an integer number (35717301).

Almost surely, 2^142355009 is an apocalyptic number.

It is an amenable number.

142355009 is a deficient number, since it is larger than the sum of its proper divisors (514195).

142355009 is an equidigital number, since it uses as much as digits as its factorization.

142355009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514194.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 142355009 is about 11931.2618360339. The cubic root of 142355009 is about 522.1447524554.

The spelling of 142355009 in words is "one hundred forty-two million, three hundred fifty-five thousand, nine".