101291 has 4 divisors (see below), whose sum is σ = 102000. Its totient is φ = 100584.

The previous prime is 101287. The next prime is 101293. The reversal of 101291 is 192101.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 101291 - 2² = 101287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101293) 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, 56 + ... + 453.

It is an arithmetic number, because the mean of its divisors is an integer number (25500).

2¹⁰¹²⁹¹ is an apocalyptic number.

101291 is a deficient number, since it is larger than the sum of its proper divisors (709).

101291 is an equidigital number, since it uses as much as digits as its factorization.

101291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 101291 is about 318.2624702977. The cubic root of 101291 is about 46.6147779271.

Adding to 101291 its reverse (192101), we get a palindrome (293392).

The spelling of 101291 in words is "one hundred one thousand, two hundred ninety-one".