291641 has 8 divisors (see below), whose sum is σ = 339264. Its totient is φ = 245520.

The previous prime is 291619. The next prime is 291647. The reversal of 291641 is 146192.

It is a happy number.

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 291641 - 2¹⁰ = 290617 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (291647) 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, 86 + ... + 768.

It is an arithmetic number, because the mean of its divisors is an integer number (42408).

2²⁹¹⁶⁴¹ is an apocalyptic number.

It is an amenable number.

291641 is a deficient number, since it is larger than the sum of its proper divisors (47623).

291641 is an equidigital number, since it uses as much as digits as its factorization.

291641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751.

The product of its digits is 432, while the sum is 23.

The square root of 291641 is about 540.0379616286. The cubic root of 291641 is about 66.3156747577.

The spelling of 291641 in words is "two hundred ninety-one thousand, six hundred forty-one".