142959138409 has 4 divisors (see below), whose sum is σ = 143289298516. Its totient is φ = 142628978304.

The previous prime is 142959138397. The next prime is 142959138431. The reversal of 142959138409 is 904831959241.

It is a happy number.

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 20128515625 + 122830622784 = 141875^2 + 350472^2 .

It is a cyclic number.

It is not a de Polignac number, because 142959138409 - 2¹⁹ = 142958614121 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 142959138409.

It is not an unprimeable number, because it can be changed into a prime (142959133409) 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, 165079404 + ... + 165080269.

It is an arithmetic number, because the mean of its divisors is an integer number (35822324629).

Almost surely, 2^142959138409 is an apocalyptic number.

It is an amenable number.

142959138409 is a deficient number, since it is larger than the sum of its proper divisors (330160107).

142959138409 is an equidigital number, since it uses as much as digits as its factorization.

142959138409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330160106.

The product of its (nonzero) digits is 2799360, while the sum is 55.

The spelling of 142959138409 in words is "one hundred forty-two billion, nine hundred fifty-nine million, one hundred thirty-eight thousand, four hundred nine".