122742647 has 8 divisors (see below), whose sum is σ = 125271360. Its totient is φ = 120221920.

The previous prime is 122742629. The next prime is 122742649. The reversal of 122742647 is 746247221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 122742647 - 2⁶ = 122742583 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 (122742649) 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 7 ways as a sum of consecutive naturals, for example, 36497 + ... + 39717.

It is an arithmetic number, because the mean of its divisors is an integer number (15658920).

Almost surely, 2^122742647 is an apocalyptic number.

122742647 is a deficient number, since it is larger than the sum of its proper divisors (2528713).

122742647 is an equidigital number, since it uses as much as digits as its factorization.

122742647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3993.

The product of its digits is 37632, while the sum is 35.

The square root of 122742647 is about 11078.9280618659. The cubic root of 122742647 is about 496.9718941715.

Adding to 122742647 its reverse (746247221), we get a palindrome (868989868).

The spelling of 122742647 in words is "one hundred twenty-two million, seven hundred forty-two thousand, six hundred forty-seven".