122721746 has 16 divisors (see below), whose sum is σ = 217167360. Its totient is φ = 50898240.

The previous prime is 122721743. The next prime is 122721749. The reversal of 122721746 is 647127221.

It is an interprime number because it is at equal distance from previous prime (122721743) and next prime (122721749).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (122721743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140951 + ... + 141818.

It is an arithmetic number, because the mean of its divisors is an integer number (13572960).

Almost surely, 2^122721746 is an apocalyptic number.

122721746 is a deficient number, since it is larger than the sum of its proper divisors (94445614).

122721746 is a wasteful number, since it uses less digits than its factorization.

122721746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282809.

The product of its digits is 9408, while the sum is 32.

The square root of 122721746 is about 11077.9847445282. The cubic root of 122721746 is about 496.9436839298.

Adding to 122721746 its reverse (647127221), we get a palindrome (769848967).

The spelling of 122721746 in words is "one hundred twenty-two million, seven hundred twenty-one thousand, seven hundred forty-six".