122478489 has 81 divisors (see below), whose sum is σ = 225894591. Its totient is φ = 63745920.

The previous prime is 122478487. The next prime is 122478497. The reversal of 122478489 is 984874221.

The square root of 122478489 is 11067.

It is a perfect power (a square), and thus also a powerful number.

122478489 is a `hidden beast` number, since 122 + 47 + 8 + 489 = 666.

It can be written as a sum of positive squares in only one way, i.e., 95355225 + 27123264 = 9765^2 + 5208^2 .

It is not a de Polignac number, because 122478489 - 2¹ = 122478487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (122478487) 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 80 ways as a sum of consecutive naturals, for example, 3950904 + ... + 3950934.

Almost surely, 2^122478489 is an apocalyptic number.

122478489 is the 11067-th square number.

122478489 is the 5534-th centered octagonal number.

It is an amenable number.

122478489 is a deficient number, since it is larger than the sum of its proper divisors (103416102).

122478489 is a wasteful number, since it uses less digits than its factorization.

122478489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116 (or 58 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The cubic root of 122478489 is about 496.6151222477.

It can be divided in two parts, 12247 and 8489, that added together give a 4-th power (20736 = 12⁴).

The spelling of 122478489 in words is "one hundred twenty-two million, four hundred seventy-eight thousand, four hundred eighty-nine".