142921902681 has 8 divisors (see below), whose sum is σ = 211736152160. Its totient is φ = 95281268436.

The previous prime is 142921902677. The next prime is 142921902689. The reversal of 142921902681 is 186209129241.

It is a happy number.

142921902681 is a `hidden beast` number, since 1 + 429 + 219 + 0 + 2 + 6 + 8 + 1 = 666.

It is not a de Polignac number, because 142921902681 - 2² = 142921902677 is a prime.

It is a super-2 number, since 2×142921902681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (142921902689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2646701875 + ... + 2646701928.

It is an arithmetic number, because the mean of its divisors is an integer number (26467019020).

Almost surely, 2^142921902681 is an apocalyptic number.

It is an amenable number.

142921902681 is a deficient number, since it is larger than the sum of its proper divisors (68814249479).

142921902681 is an equidigital number, since it uses as much as digits as its factorization.

142921902681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5293403812 (or 5293403806 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The spelling of 142921902681 in words is "one hundred forty-two billion, nine hundred twenty-one million, nine hundred two thousand, six hundred eighty-one".