122478539 has 2 divisors, whose sum is σ = 122478540. Its totient is φ = 122478538.

The previous prime is 122478533. The next prime is 122478619. The reversal of 122478539 is 935874221.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122478539 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 122478496 and 122478505.

It is not a weakly prime, because it can be changed into another prime (122478533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61239269 + 61239270.

It is an arithmetic number, because the mean of its divisors is an integer number (61239270).

Almost surely, 2^122478539 is an apocalyptic number.

122478539 is a deficient number, since it is larger than the sum of its proper divisors (1).

122478539 is an equidigital number, since it uses as much as digits as its factorization.

122478539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 41.

The square root of 122478539 is about 11067.0022589679. The cubic root of 122478539 is about 496.6151898263.

The spelling of 122478539 in words is "one hundred twenty-two million, four hundred seventy-eight thousand, five hundred thirty-nine".