122908405 has 16 divisors (see below), whose sum is σ = 152285760. Its totient is φ = 95171328.

The previous prime is 122908403. The next prime is 122908411. The reversal of 122908405 is 504809221.

It is a cyclic number.

It is not a de Polignac number, because 122908405 - 2¹ = 122908403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122908403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21766 + ... + 26824.

It is an arithmetic number, because the mean of its divisors is an integer number (9517860).

Almost surely, 2^122908405 is an apocalyptic number.

It is an amenable number.

122908405 is a deficient number, since it is larger than the sum of its proper divisors (29377355).

122908405 is a wasteful number, since it uses less digits than its factorization.

122908405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5220.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 122908405 is about 11086.4063158446. The cubic root of 122908405 is about 497.1955057006.

The spelling of 122908405 in words is "one hundred twenty-two million, nine hundred eight thousand, four hundred five".