142170140 has 24 divisors (see below), whose sum is σ = 341208672. Its totient is φ = 48744000.

The previous prime is 142170131. The next prime is 142170157. The reversal of 142170140 is 41071241.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 507611 + ... + 507890.

It is an arithmetic number, because the mean of its divisors is an integer number (14217028).

Almost surely, 2^142170140 is an apocalyptic number.

142170140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142170140 is an abundant number, since it is smaller than the sum of its proper divisors (199038532).

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

142170140 is a wasteful number, since it uses less digits than its factorization.

142170140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1015517 (or 1015515 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 142170140 is about 11923.5120665012. The cubic root of 142170140 is about 521.9186271869.

The spelling of 142170140 in words is "one hundred forty-two million, one hundred seventy thousand, one hundred forty".