142194689 has 16 divisors (see below), whose sum is σ = 184222080. Its totient is φ = 106583040.

The previous prime is 142194673. The next prime is 142194691. The reversal of 142194689 is 986491241.

It is a cyclic number.

It is not a de Polignac number, because 142194689 - 2⁴ = 142194673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (142194649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39392 + ... + 42849.

It is an arithmetic number, because the mean of its divisors is an integer number (11513880).

Almost surely, 2^142194689 is an apocalyptic number.

142194689 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

142194689 is a deficient number, since it is larger than the sum of its proper divisors (42027391).

142194689 is a wasteful number, since it uses less digits than its factorization.

142194689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82280.

The product of its digits is 124416, while the sum is 44.

The square root of 142194689 is about 11924.5414586893. The cubic root of 142194689 is about 521.9486659442.

The spelling of 142194689 in words is "one hundred forty-two million, one hundred ninety-four thousand, six hundred eighty-nine".