122905144 has 8 divisors (see below), whose sum is σ = 230447160. Its totient is φ = 61452568.

The previous prime is 122905127. The next prime is 122905147. The reversal of 122905144 is 441509221.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122905147) 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 as a sum of consecutive naturals, namely, 7681564 + ... + 7681579.

It is an arithmetic number, because the mean of its divisors is an integer number (28805895).

Almost surely, 2^122905144 is an apocalyptic number.

It is an amenable number.

122905144 is a deficient number, since it is larger than the sum of its proper divisors (107542016).

122905144 is a wasteful number, since it uses less digits than its factorization.

122905144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15363149 (or 15363145 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 122905144 is about 11086.2592428646. The cubic root of 122905144 is about 497.1911084725.

The spelling of 122905144 in words is "one hundred twenty-two million, nine hundred five thousand, one hundred forty-four".