9781000142 has 16 divisors (see below), whose sum is σ = 15152028480. Its totient is φ = 4732662528.

The previous prime is 9781000111. The next prime is 9781000157. The reversal of 9781000142 is 2410001879.

It is a junction number, because it is equal to n+sod(n) for n = 9781000099 and 9781000108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 576203 + ... + 592934.

It is an arithmetic number, because the mean of its divisors is an integer number (947001780).

Almost surely, 2^9781000142 is an apocalyptic number.

9781000142 is a deficient number, since it is larger than the sum of its proper divisors (5371028338).

9781000142 is a wasteful number, since it uses less digits than its factorization.

9781000142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1169275.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 9781000142 is about 98898.9390337429. The cubic root of 9781000142 is about 2138.5910997392.

The spelling of 9781000142 in words is "nine billion, seven hundred eighty-one million, one hundred forty-two", and thus it is an aban number.