191142642 has 8 divisors (see below), whose sum is σ = 382285296. Its totient is φ = 63714212.

The previous prime is 191142631. The next prime is 191142647. The reversal of 191142642 is 246241191.

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

191142642 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (191142647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15928548 + ... + 15928559.

It is an arithmetic number, because the mean of its divisors is an integer number (47785662).

Almost surely, 2^191142642 is an apocalyptic number.

191142642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

191142642 is a wasteful number, since it uses less digits than its factorization.

191142642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31857112.

The product of its digits is 3456, while the sum is 30.

The square root of 191142642 is about 13825.4346043804. The cubic root of 191142642 is about 576.0398494325.

The spelling of 191142642 in words is "one hundred ninety-one million, one hundred forty-two thousand, six hundred forty-two".