122172261 has 32 divisors (see below), whose sum is σ = 179591040. Its totient is φ = 73592064.

The previous prime is 122172247. The next prime is 122172263. The reversal of 122172261 is 162271221.

It is not a de Polignac number, because 122172261 - 2¹⁰ = 122171237 is a prime.

It is a super-2 number, since 2×122172261² = 29852122715704242, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122172263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 111231 + ... + 112323.

It is an arithmetic number, because the mean of its divisors is an integer number (5612220).

Almost surely, 2^122172261 is an apocalyptic number.

It is an amenable number.

122172261 is a deficient number, since it is larger than the sum of its proper divisors (57418779).

122172261 is a wasteful number, since it uses less digits than its factorization.

122172261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1205.

The product of its digits is 672, while the sum is 24.

The square root of 122172261 is about 11053.1561555965. The cubic root of 122172261 is about 496.2008879398.

The spelling of 122172261 in words is "one hundred twenty-two million, one hundred seventy-two thousand, two hundred sixty-one".