142445227421 has 16 divisors (see below), whose sum is σ = 163972988928. Its totient is φ = 121214626800.

The previous prime is 142445227417. The next prime is 142445227471. The reversal of 142445227421 is 124722544241.

142445227421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 142445227421 - 2² = 142445227417 is a prime.

It is a super-2 number, since 2×142445227421² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142445227471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 566606 + ... + 778416.

It is an arithmetic number, because the mean of its divisors is an integer number (10248311808).

Almost surely, 2^142445227421 is an apocalyptic number.

It is an amenable number.

142445227421 is a deficient number, since it is larger than the sum of its proper divisors (21527761507).

142445227421 is a wasteful number, since it uses less digits than its factorization.

142445227421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212512.

The product of its digits is 143360, while the sum is 38.

The spelling of 142445227421 in words is "one hundred forty-two billion, four hundred forty-five million, two hundred twenty-seven thousand, four hundred twenty-one".