142001720 has 32 divisors (see below), whose sum is σ = 365148000. Its totient is φ = 48686208.

The previous prime is 142001707. The next prime is 142001723. The reversal of 142001720 is 27100241.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142001723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253295 + ... + 253854.

It is an arithmetic number, because the mean of its divisors is an integer number (11410875).

Almost surely, 2^142001720 is an apocalyptic number.

142001720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142001720 is an abundant number, since it is smaller than the sum of its proper divisors (223146280).

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

142001720 is a wasteful number, since it uses less digits than its factorization.

142001720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507167 (or 507163 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 142001720 is about 11916.4474571913. The cubic root of 142001720 is about 521.7124510552.

Adding to 142001720 its reverse (27100241), we get a palindrome (169101961).

The spelling of 142001720 in words is "one hundred forty-two million, one thousand, seven hundred twenty".