140241212509 has 4 divisors (see below), whose sum is σ = 140245698780. Its totient is φ = 140236726240.

The previous prime is 140241212473. The next prime is 140241212533. The reversal of 140241212509 is 905212142041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 905212142041 = 2659 ⋅340433299.

It can be written as a sum of positive squares in 2 ways, for example, as 15381456484 + 124859756025 = 124022^2 + 353355^2 .

It is a cyclic number.

It is not a de Polignac number, because 140241212509 - 2¹⁷ = 140241081437 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 (140241215509) 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, 2195914 + ... + 2258875.

It is an arithmetic number, because the mean of its divisors is an integer number (35061424695).

Almost surely, 2^140241212509 is an apocalyptic number.

It is an amenable number.

140241212509 is a deficient number, since it is larger than the sum of its proper divisors (4486271).

140241212509 is an equidigital number, since it uses as much as digits as its factorization.

140241212509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4486270.

The product of its (nonzero) digits is 5760, while the sum is 31.

The spelling of 140241212509 in words is "one hundred forty billion, two hundred forty-one million, two hundred twelve thousand, five hundred nine".