191140042 has 8 divisors (see below), whose sum is σ = 287644896. Its totient is φ = 95258412.

The previous prime is 191140021. The next prime is 191140069. The reversal of 191140042 is 240041191.

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

It is a super-3 number, since 3×191140042³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 191139995 and 191140022.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155038 + ... + 156265.

It is an arithmetic number, because the mean of its divisors is an integer number (35955612).

Almost surely, 2^191140042 is an apocalyptic number.

191140042 is a deficient number, since it is larger than the sum of its proper divisors (96504854).

191140042 is a wasteful number, since it uses less digits than its factorization.

191140042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311612.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 191140042 is about 13825.3405744669. The cubic root of 191140042 is about 576.0372375778.

The spelling of 191140042 in words is "one hundred ninety-one million, one hundred forty thousand, forty-two".