142170691 has 8 divisors (see below), whose sum is σ = 155046080. Its totient is φ = 129572352.

The previous prime is 142170689. The next prime is 142170701. The reversal of 142170691 is 196071241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 142170691 - 2¹ = 142170689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142170631) 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 7 ways as a sum of consecutive naturals, for example, 68190 + ... + 70243.

It is an arithmetic number, because the mean of its divisors is an integer number (19380760).

Almost surely, 2^142170691 is an apocalyptic number.

142170691 is a deficient number, since it is larger than the sum of its proper divisors (12875389).

142170691 is a wasteful number, since it uses less digits than its factorization.

142170691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138525.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 142170691 is about 11923.5351720872. The cubic root of 142170691 is about 521.9193014420.

The spelling of 142170691 in words is "one hundred forty-two million, one hundred seventy thousand, six hundred ninety-one".