142170993 has 12 divisors (see below), whose sum is σ = 206087440. Its totient is φ = 94444056.

The previous prime is 142170979. The next prime is 142170997. The reversal of 142170993 is 399071241.

It is not a de Polignac number, because 142170993 - 2⁸ = 142170737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (142170997) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25363 + ... + 30456.

Almost surely, 2^142170993 is an apocalyptic number.

It is an amenable number.

142170993 is a deficient number, since it is larger than the sum of its proper divisors (63916447).

142170993 is a wasteful number, since it uses less digits than its factorization.

142170993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56108 (or 56105 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 142170993 is about 11923.5478361099. The cubic root of 142170993 is about 521.9196709966.

The spelling of 142170993 in words is "one hundred forty-two million, one hundred seventy thousand, nine hundred ninety-three".