122102405 has 8 divisors (see below), whose sum is σ = 150483192. Its totient is φ = 95041728.

The previous prime is 122102401. The next prime is 122102437. The reversal of 122102405 is 504201221.

It can be written as a sum of positive squares in 4 ways, for example, as 23338561 + 98763844 = 4831^2 + 9938^2 .

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 122102405 - 2² = 122102401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122102401) 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, 329822 + ... + 330191.

It is an arithmetic number, because the mean of its divisors is an integer number (18810399).

Almost surely, 2^122102405 is an apocalyptic number.

It is an amenable number.

122102405 is a deficient number, since it is larger than the sum of its proper divisors (28380787).

122102405 is an equidigital number, since it uses as much as digits as its factorization.

122102405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660055.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 122102405 is about 11049.9957013566. The cubic root of 122102405 is about 496.1062968613.

Adding to 122102405 its reverse (504201221), we get a palindrome (626303626).

The spelling of 122102405 in words is "one hundred twenty-two million, one hundred two thousand, four hundred five".