122664785 has 16 divisors (see below), whose sum is σ = 149521680. Its totient is φ = 96595200.

The previous prime is 122664781. The next prime is 122664793. The reversal of 122664785 is 587466221.

122664785 = 7831² + 7832².

It can be written as a sum of positive squares in 8 ways, for example, as 1290496 + 121374289 = 1136^2 + 11017^2 .

It is not a de Polignac number, because 122664785 - 2² = 122664781 is a prime.

It is not an unprimeable number, because it can be changed into a prime (122664781) 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 15 ways as a sum of consecutive naturals, for example, 93635 + ... + 94935.

It is an arithmetic number, because the mean of its divisors is an integer number (9345105).

Almost surely, 2^122664785 is an apocalyptic number.

122664785 is the 7832-nd centered square number.

It is an amenable number.

122664785 is a deficient number, since it is larger than the sum of its proper divisors (26856895).

122664785 is a wasteful number, since it uses less digits than its factorization.

122664785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1588.

The product of its digits is 161280, while the sum is 41.

The square root of 122664785 is about 11075.4135362974. The cubic root of 122664785 is about 496.8667869639.

The spelling of 122664785 in words is "one hundred twenty-two million, six hundred sixty-four thousand, seven hundred eighty-five".