122005261 has 8 divisors (see below), whose sum is σ = 140166144. Its totient is φ = 104027280.

The previous prime is 122005249. The next prime is 122005297. The reversal of 122005261 is 162500221.

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

It is not a de Polignac number, because 122005261 - 2⁵ = 122005229 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 (122005211) 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, 44290 + ... + 46963.

It is an arithmetic number, because the mean of its divisors is an integer number (17520768).

Almost surely, 2^122005261 is an apocalyptic number.

It is an amenable number.

122005261 is a deficient number, since it is larger than the sum of its proper divisors (18160883).

122005261 is an equidigital number, since it uses as much as digits as its factorization.

122005261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91451.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 122005261 is about 11045.5991688998. The cubic root of 122005261 is about 495.9746954767.

Adding to 122005261 its reverse (162500221), we get a palindrome (284505482).

The spelling of 122005261 in words is "one hundred twenty-two million, five thousand, two hundred sixty-one".