122012405 has 4 divisors (see below), whose sum is σ = 146414892. Its totient is φ = 97609920.

The previous prime is 122012327. The next prime is 122012437. The reversal of 122012405 is 504210221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 504210221 = 1559 ⋅323419.

It can be written as a sum of positive squares in 2 ways, for example, as 65431921 + 56580484 = 8089^2 + 7522^2 .

It is not a de Polignac number, because 122012405 - 2¹² = 122008309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12201236 + ... + 12201245.

It is an arithmetic number, because the mean of its divisors is an integer number (36603723).

Almost surely, 2^122012405 is an apocalyptic number.

It is an amenable number.

122012405 is a deficient number, since it is larger than the sum of its proper divisors (24402487).

122012405 is an equidigital number, since it uses as much as digits as its factorization.

122012405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24402486.

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

The square root of 122012405 is about 11045.9225508782. The cubic root of 122012405 is about 495.9843758628.

Adding to 122012405 its reverse (504210221), we get a palindrome (626222626).

The spelling of 122012405 in words is "one hundred twenty-two million, twelve thousand, four hundred five".