122578261 has 8 divisors (see below), whose sum is σ = 132701184. Its totient is φ = 112554480.

The previous prime is 122578249. The next prime is 122578289. The reversal of 122578261 is 162875221.

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 122578261 - 2⁷ = 122578133 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 (122578231) 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, 22201 + ... + 27166.

It is an arithmetic number, because the mean of its divisors is an integer number (16587648).

Almost surely, 2^122578261 is an apocalyptic number.

It is an amenable number.

122578261 is a deficient number, since it is larger than the sum of its proper divisors (10122923).

122578261 is a wasteful number, since it uses less digits than its factorization.

122578261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49571.

The product of its digits is 13440, while the sum is 34.

The square root of 122578261 is about 11071.5067176966. The cubic root of 122578261 is about 496.7499345899.

The spelling of 122578261 in words is "one hundred twenty-two million, five hundred seventy-eight thousand, two hundred sixty-one".