141209665 has 4 divisors (see below), whose sum is σ = 169451604. Its totient is φ = 112967728.

The previous prime is 141209657. The next prime is 141209687. The reversal of 141209665 is 566902141.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 566902141 = 13 ⋅43607857.

It can be written as a sum of positive squares in 2 ways, for example, as 86936976 + 54272689 = 9324^2 + 7367^2 .

It is a cyclic number.

It is not a de Polignac number, because 141209665 - 2³ = 141209657 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 141209665.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14120962 + ... + 14120971.

It is an arithmetic number, because the mean of its divisors is an integer number (42362901).

Almost surely, 2^141209665 is an apocalyptic number.

It is an amenable number.

141209665 is a deficient number, since it is larger than the sum of its proper divisors (28241939).

141209665 is an equidigital number, since it uses as much as digits as its factorization.

141209665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28241938.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 141209665 is about 11883.1672966428. The cubic root of 141209665 is about 520.7406420792.

The spelling of 141209665 in words is "one hundred forty-one million, two hundred nine thousand, six hundred sixty-five".