122640665 has 16 divisors (see below), whose sum is σ = 170087040. Its totient is φ = 83149440.

The previous prime is 122640659. The next prime is 122640671. The reversal of 122640665 is 566046221.

It is an interprime number because it is at equal distance from previous prime (122640659) and next prime (122640671).

It is not a de Polignac number, because 122640665 - 2¹⁶ = 122575129 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16571 + ... + 22800.

It is an arithmetic number, because the mean of its divisors is an integer number (10630440).

Almost surely, 2^122640665 is an apocalyptic number.

It is an amenable number.

122640665 is a deficient number, since it is larger than the sum of its proper divisors (47446375).

122640665 is an equidigital number, since it uses as much as digits as its factorization.

122640665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39472.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 122640665 is about 11074.3245843708. The cubic root of 122640665 is about 496.8342179521.

Adding to 122640665 its reverse (566046221), we get a palindrome (688686886).

The spelling of 122640665 in words is "one hundred twenty-two million, six hundred forty thousand, six hundred sixty-five".