191142140 has 36 divisors (see below), whose sum is σ = 466935336. Its totient is φ = 65534112.

The previous prime is 191142137. The next prime is 191142163. The reversal of 191142140 is 41241191.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 96542 + ... + 98501.

It is an arithmetic number, because the mean of its divisors is an integer number (12970426).

Almost surely, 2^191142140 is an apocalyptic number.

191142140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

191142140 is an abundant number, since it is smaller than the sum of its proper divisors (275793196).

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

191142140 is a wasteful number, since it uses less digits than its factorization.

191142140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195066 (or 195057 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 191142140 is about 13825.4164494239. The cubic root of 191142140 is about 576.0393451454.

The spelling of 191142140 in words is "one hundred ninety-one million, one hundred forty-two thousand, one hundred forty".