142120170 has 80 divisors (see below), whose sum is σ = 404663688. Its totient is φ = 35665920.

The previous prime is 142120169. The next prime is 142120177. The reversal of 142120170 is 71021241.

It can be written as a sum of positive squares in 4 ways, for example, as 130850721 + 11269449 = 11439^2 + 3357^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142120177) 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 39 ways as a sum of consecutive naturals, for example, 8610 + ... + 18930.

Almost surely, 2^142120170 is an apocalyptic number.

142120170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 142120170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (202331844).

142120170 is an abundant number, since it is smaller than the sum of its proper divisors (262543518).

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

142120170 is a wasteful number, since it uses less digits than its factorization.

142120170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10357 (or 10348 counting only the distinct ones).

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

The square root of 142120170 is about 11921.4164426883. The cubic root of 142120170 is about 521.8574719871.

The spelling of 142120170 in words is "one hundred forty-two million, one hundred twenty thousand, one hundred seventy".