142171742 has 4 divisors (see below), whose sum is σ = 213257616. Its totient is φ = 71085870.

The previous prime is 142171739. The next prime is 142171787. The reversal of 142171742 is 247171241.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35542934 + ... + 35542937.

It is an arithmetic number, because the mean of its divisors is an integer number (53314404).

Almost surely, 2^142171742 is an apocalyptic number.

142171742 is a deficient number, since it is larger than the sum of its proper divisors (71085874).

142171742 is an equidigital number, since it uses as much as digits as its factorization.

142171742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71085873.

The product of its digits is 3136, while the sum is 29.

The square root of 142171742 is about 11923.5792445054. The cubic root of 142171742 is about 521.9205875388.

The spelling of 142171742 in words is "one hundred forty-two million, one hundred seventy-one thousand, seven hundred forty-two".