142319195721 has 16 divisors (see below), whose sum is σ = 210862713600. Its totient is φ = 94870706544.

The previous prime is 142319195693. The next prime is 142319195729. The reversal of 142319195721 is 127591913241.

142319195721 is a `hidden beast` number, since 1 + 42 + 31 + 9 + 1 + 9 + 572 + 1 = 666.

It is not a de Polignac number, because 142319195721 - 2⁶ = 142319195657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (142319195729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61635 + ... + 537063.

It is an arithmetic number, because the mean of its divisors is an integer number (13178919600).

Almost surely, 2^142319195721 is an apocalyptic number.

It is an amenable number.

142319195721 is a deficient number, since it is larger than the sum of its proper divisors (68543517879).

142319195721 is a wasteful number, since it uses less digits than its factorization.

142319195721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486525 (or 486519 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The spelling of 142319195721 in words is "one hundred forty-two billion, three hundred nineteen million, one hundred ninety-five thousand, seven hundred twenty-one".