101261 has 4 divisors (see below), whose sum is σ = 102300. Its totient is φ = 100224.

The previous prime is 101221. The next prime is 101267. The reversal of 101261 is 162101.

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, and also an emirpimes, since its reverse is a distinct semiprime: 162101 = 173 ⋅937.

It can be written as a sum of positive squares in 2 ways, for example, as 28900 + 72361 = 170^2 + 269^2 .

It is a cyclic number.

It is not a de Polignac number, because 101261 - 2⁶ = 101197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101267) 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, 356 + ... + 573.

It is an arithmetic number, because the mean of its divisors is an integer number (25575).

2¹⁰¹²⁶¹ is an apocalyptic number.

It is an amenable number.

101261 is a deficient number, since it is larger than the sum of its proper divisors (1039).

101261 is an equidigital number, since it uses as much as digits as its factorization.

101261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 101261 is about 318.2153358969. The cubic root of 101261 is about 46.6101754076.

Adding to 101261 its reverse (162101), we get a palindrome (263362).

The spelling of 101261 in words is "one hundred one thousand, two hundred sixty-one".