122428387 has 2 divisors, whose sum is σ = 122428388. Its totient is φ = 122428386.

The previous prime is 122428351. The next prime is 122428399. The reversal of 122428387 is 783824221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122428387 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (122428307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61214193 + 61214194.

It is an arithmetic number, because the mean of its divisors is an integer number (61214194).

Almost surely, 2^122428387 is an apocalyptic number.

122428387 is a deficient number, since it is larger than the sum of its proper divisors (1).

122428387 is an equidigital number, since it uses as much as digits as its factorization.

122428387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43008, while the sum is 37.

The square root of 122428387 is about 11064.7361920653. The cubic root of 122428387 is about 496.5473966018.

The spelling of 122428387 in words is "one hundred twenty-two million, four hundred twenty-eight thousand, three hundred eighty-seven".