142018909 has 4 divisors (see below), whose sum is σ = 142115904. Its totient is φ = 141921916.

The previous prime is 142018907. The next prime is 142018927. The reversal of 142018909 is 909810241.

142018909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 142018909 - 2¹ = 142018907 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 (142018907) 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, 46267 + ... + 49240.

It is an arithmetic number, because the mean of its divisors is an integer number (35528976).

Almost surely, 2^142018909 is an apocalyptic number.

It is an amenable number.

142018909 is a deficient number, since it is larger than the sum of its proper divisors (96995).

142018909 is an equidigital number, since it uses as much as digits as its factorization.

142018909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96994.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 142018909 is about 11917.1686654171. The cubic root of 142018909 is about 521.7335009259.

The spelling of 142018909 in words is "one hundred forty-two million, eighteen thousand, nine hundred nine".