142002194 has 4 divisors (see below), whose sum is σ = 213003294. Its totient is φ = 71001096.

The previous prime is 142002193. The next prime is 142002199. The reversal of 142002194 is 491200241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 491200241 = 7 ⋅70171463.

It can be written as a sum of positive squares in only one way, i.e., 141967225 + 34969 = 11915^2 + 187^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (142002193) 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 as a sum of consecutive naturals, namely, 35500547 + ... + 35500550.

Almost surely, 2^142002194 is an apocalyptic number.

142002194 is a deficient number, since it is larger than the sum of its proper divisors (71001100).

142002194 is an equidigital number, since it uses as much as digits as its factorization.

142002194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71001099.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 142002194 is about 11916.4673456524. The cubic root of 142002194 is about 521.7130315445.

The spelling of 142002194 in words is "one hundred forty-two million, two thousand, one hundred ninety-four".