142492195921 has 16 divisors (see below), whose sum is σ = 151873136640. Its totient is φ = 133306387200.

The previous prime is 142492195907. The next prime is 142492195949. The reversal of 142492195921 is 129591294241.

It is a cyclic number.

It is not a de Polignac number, because 142492195921 - 2⁵ = 142492195889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142492195421) 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, 638041 + ... + 831913.

It is an arithmetic number, because the mean of its divisors is an integer number (9492071040).

Almost surely, 2^142492195921 is an apocalyptic number.

It is an amenable number.

142492195921 is a deficient number, since it is larger than the sum of its proper divisors (9380940719).

142492195921 is a wasteful number, since it uses less digits than its factorization.

142492195921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194376.

The product of its digits is 466560, while the sum is 49.

The spelling of 142492195921 in words is "one hundred forty-two billion, four hundred ninety-two million, one hundred ninety-five thousand, nine hundred twenty-one".