142171961860 has 96 divisors (see below), whose sum is σ = 322014365568. Its totient is φ = 52532029440.

The previous prime is 142171961801. The next prime is 142171961861. The reversal of 142171961860 is 68169171241.

It is a self number, because there is not a number n which added to its sum of digits gives 142171961860.

It is not an unprimeable number, because it can be changed into a prime (142171961861) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6298795 + ... + 6321325.

It is an arithmetic number, because the mean of its divisors is an integer number (3354316308).

Almost surely, 2^142171961860 is an apocalyptic number.

142171961860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 142171961860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161007182784).

142171961860 is an abundant number, since it is smaller than the sum of its proper divisors (179842403708).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

142171961860 is a wasteful number, since it uses less digits than its factorization.

142171961860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22901 (or 22899 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 46.

The spelling of 142171961860 in words is "one hundred forty-two billion, one hundred seventy-one million, nine hundred sixty-one thousand, eight hundred sixty".