141218009 has 4 divisors (see below), whose sum is σ = 141404340. Its totient is φ = 141031680.

The previous prime is 141217987. The next prime is 141218029. The reversal of 141218009 is 900812141.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 900812141 = 7759 ⋅116099.

It can be written as a sum of positive squares in 2 ways, for example, as 12054784 + 129163225 = 3472^2 + 11365^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-141218009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (141218029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92024 + ... + 93545.

It is an arithmetic number, because the mean of its divisors is an integer number (35351085).

Almost surely, 2^141218009 is an apocalyptic number.

It is an amenable number.

141218009 is a deficient number, since it is larger than the sum of its proper divisors (186331).

141218009 is an equidigital number, since it uses as much as digits as its factorization.

141218009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186330.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 141218009 is about 11883.5183763059. The cubic root of 141218009 is about 520.7508986348.

The spelling of 141218009 in words is "one hundred forty-one million, two hundred eighteen thousand, nine".