101720142 has 24 divisors (see below), whose sum is σ = 222134016. Its totient is φ = 33638976.

The previous prime is 101720119. The next prime is 101720153. The reversal of 101720142 is 241027101.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19963 + ... + 24534.

It is an arithmetic number, because the mean of its divisors is an integer number (9255584).

Almost surely, 2^101720142 is an apocalyptic number.

101720142 is an abundant number, since it is smaller than the sum of its proper divisors (120413874).

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

101720142 is a wasteful number, since it uses less digits than its factorization.

101720142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44632 (or 44629 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 101720142 is about 10085.6403862125. The cubic root of 101720142 is about 466.8051649012.

Adding to 101720142 its reverse (241027101), we get a palindrome (342747243).

The spelling of 101720142 in words is "one hundred one million, seven hundred twenty thousand, one hundred forty-two".