122165409 has 4 divisors (see below), whose sum is σ = 162887216. Its totient is φ = 81443604.

The previous prime is 122165387. The next prime is 122165419. The reversal of 122165409 is 904561221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 122165409 - 2¹¹ = 122163361 is a prime.

It is a super-2 number, since 2×122165409² = 29848774312274562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122165419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20360899 + ... + 20360904.

It is an arithmetic number, because the mean of its divisors is an integer number (40721804).

Almost surely, 2^122165409 is an apocalyptic number.

It is an amenable number.

122165409 is a deficient number, since it is larger than the sum of its proper divisors (40721807).

122165409 is an equidigital number, since it uses as much as digits as its factorization.

122165409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40721806.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 122165409 is about 11052.8461945329. The cubic root of 122165409 is about 496.1916113331.

The spelling of 122165409 in words is "one hundred twenty-two million, one hundred sixty-five thousand, four hundred nine".