142521603681 has 8 divisors (see below), whose sum is σ = 190700285920. Its totient is φ = 94678661952.

The previous prime is 142521603673. The next prime is 142521603683. The reversal of 142521603681 is 186306125241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 142521603681 - 2³ = 142521603673 is a prime.

It is a super-2 number, since 2×142521603681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142521603683) 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, 83934136 + ... + 83935833.

It is an arithmetic number, because the mean of its divisors is an integer number (23837535740).

Almost surely, 2^142521603681 is an apocalyptic number.

It is an amenable number.

142521603681 is a deficient number, since it is larger than the sum of its proper divisors (48178682239).

142521603681 is a wasteful number, since it uses less digits than its factorization.

142521603681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167870255.

The product of its (nonzero) digits is 69120, while the sum is 39.

The spelling of 142521603681 in words is "one hundred forty-two billion, five hundred twenty-one million, six hundred three thousand, six hundred eighty-one".