122640943 has 4 divisors (see below), whose sum is σ = 124193440. Its totient is φ = 121088448.

The previous prime is 122640937. The next prime is 122640961. The reversal of 122640943 is 349046221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 349046221 = 2417 ⋅144413.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122640943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122643943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 776130 + ... + 776287.

It is an arithmetic number, because the mean of its divisors is an integer number (31048360).

Almost surely, 2^122640943 is an apocalyptic number.

122640943 is a deficient number, since it is larger than the sum of its proper divisors (1552497).

122640943 is an equidigital number, since it uses as much as digits as its factorization.

122640943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1552496.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 122640943 is about 11074.3371359192. The cubic root of 122640943 is about 496.8345933572.

The spelling of 122640943 in words is "one hundred twenty-two million, six hundred forty thousand, nine hundred forty-three".