191285641 has 8 divisors (see below), whose sum is σ = 200801664. Its totient is φ = 181869600.

The previous prime is 191285587. The next prime is 191285657. The reversal of 191285641 is 146582191.

191285641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 191285641 - 2¹⁹ = 190761353 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 191285641.

It is not an unprimeable number, because it can be changed into a prime (191285041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21060 + ... + 28741.

It is an arithmetic number, because the mean of its divisors is an integer number (25100208).

Almost surely, 2^191285641 is an apocalyptic number.

It is an amenable number.

191285641 is a deficient number, since it is larger than the sum of its proper divisors (9516023).

191285641 is a wasteful number, since it uses less digits than its factorization.

191285641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49991.

The product of its digits is 17280, while the sum is 37.

The square root of 191285641 is about 13830.6052289840. The cubic root of 191285641 is about 576.1834639747.

The spelling of 191285641 in words is "one hundred ninety-one million, two hundred eighty-five thousand, six hundred forty-one".