122143505 has 16 divisors (see below), whose sum is σ = 165412800. Its totient is φ = 85767360.

The previous prime is 122143499. The next prime is 122143507. The reversal of 122143505 is 505341221.

It is not a de Polignac number, because 122143505 - 2¹⁰ = 122142481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (122143507) 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 15 ways as a sum of consecutive naturals, for example, 36695 + ... + 39884.

It is an arithmetic number, because the mean of its divisors is an integer number (10338300).

Almost surely, 2^122143505 is an apocalyptic number.

It is an amenable number.

122143505 is a deficient number, since it is larger than the sum of its proper divisors (43269295).

122143505 is a wasteful number, since it uses less digits than its factorization.

122143505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76624.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 122143505 is about 11051.8552741157. The cubic root of 122143505 is about 496.1619541910.

Adding to 122143505 its reverse (505341221), we get a palindrome (627484726).

The spelling of 122143505 in words is "one hundred twenty-two million, one hundred forty-three thousand, five hundred five".