142605012421 has 4 divisors (see below), whose sum is σ = 147205174144. Its totient is φ = 138004850700.

The previous prime is 142605012299. The next prime is 142605012427. The reversal of 142605012421 is 124210506241.

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, and also an emirpimes, since its reverse is a distinct semiprime: 124210506241 = 273971 ⋅453371.

It is a cyclic number.

It is not a de Polignac number, because 142605012421 - 2¹³ = 142605004229 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 142605012421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142605012427) 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, 2300080815 + ... + 2300080876.

It is an arithmetic number, because the mean of its divisors is an integer number (36801293536).

Almost surely, 2^142605012421 is an apocalyptic number.

It is an amenable number.

142605012421 is a deficient number, since it is larger than the sum of its proper divisors (4600161723).

142605012421 is an equidigital number, since it uses as much as digits as its factorization.

142605012421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4600161722.

The product of its (nonzero) digits is 3840, while the sum is 28.

Adding to 142605012421 its reverse (124210506241), we get a palindrome (266815518662).

The spelling of 142605012421 in words is "one hundred forty-two billion, six hundred five million, twelve thousand, four hundred twenty-one".